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42639449677 = 113876313607
BaseRepresentation
bin100111101101100000…
…100101111001001101
311002001121122110202221
4213231200211321031
51144311144342202
631331023215341
73036434225236
oct475540457115
9132047573687
1042639449677
11170a0948710
12831ba47551
134036b586c6
1420c6d5c08d
1511985ab037
hex9ed825e4d

42639449677 has 4 divisors (see below), whose sum is σ = 46515763296. Its totient is φ = 38763136060.

The previous prime is 42639449641. The next prime is 42639449717. The reversal of 42639449677 is 77694493624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42639449677 - 27 = 42639449549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42639449777) 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 3 ways as a sum of consecutive naturals, for example, 1938156793 + ... + 1938156814.

It is an arithmetic number, because the mean of its divisors is an integer number (11628940824).

Almost surely, 242639449677 is an apocalyptic number.

It is an amenable number.

42639449677 is a deficient number, since it is larger than the sum of its proper divisors (3876313619).

42639449677 is a wasteful number, since it uses less digits than its factorization.

42639449677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876313618.

The product of its digits is 54867456, while the sum is 61.

The spelling of 42639449677 in words is "forty-two billion, six hundred thirty-nine million, four hundred forty-nine thousand, six hundred seventy-seven".

Divisors: 1 11 3876313607 42639449677