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6401387913 = 320631034317
BaseRepresentation
bin1011111011000110…
…10110110110001001
3121112010100012101020
411331203112312021
5101102223403123
62535111543053
7314426620344
oct57543266611
917463305336
106401387913
112795464538
1212a798aa89
137b02a4ccb
1444a25545b
15276ec27e3
hex17d8d6d89

6401387913 has 8 divisors (see below), whose sum is σ = 8539329408. Its totient is φ = 4265519184.

The previous prime is 6401387897. The next prime is 6401387929. The reversal of 6401387913 is 3197831046.

It is an interprime number because it is at equal distance from previous prime (6401387897) and next prime (6401387929).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6401387913 - 24 = 6401387897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6401387953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510970 + ... + 523347.

It is an arithmetic number, because the mean of its divisors is an integer number (1067416176).

Almost surely, 26401387913 is an apocalyptic number.

It is an amenable number.

6401387913 is a deficient number, since it is larger than the sum of its proper divisors (2137941495).

6401387913 is a wasteful number, since it uses less digits than its factorization.

6401387913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036383.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 6401387913 is about 80008.6739860123. The cubic root of 6401387913 is about 1856.7697346088.

The spelling of 6401387913 in words is "six billion, four hundred one million, three hundred eighty-seven thousand, nine hundred thirteen".

Divisors: 1 3 2063 6189 1034317 3102951 2133795971 6401387913