6403260220551 has 12 divisors (see below), whose sum is σ = 9275355224928. Its totient is φ = 4256747113344.

The previous prime is 6403260220547. The next prime is 6403260220603. The reversal of 6403260220551 is 1550220623046.

6403260220551 is a `hidden beast` number, since 6 + 40 + 3 + 2 + 60 + 2 + 2 + 0 + 551 = 666.

It is not a de Polignac number, because 6403260220551 - 2² = 6403260220547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403260221551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1007749455 + ... + 1007755808.

It is an arithmetic number, because the mean of its divisors is an integer number (772946268744).

Almost surely, 2^{6403260220551} is an apocalyptic number.

6403260220551 is a deficient number, since it is larger than the sum of its proper divisors (2872095004377).

6403260220551 is a wasteful number, since it uses less digits than its factorization.

6403260220551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015505622 (or 2015505619 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 6403260220551 its reverse (1550220623046), we get a palindrome (7953480843597).

The spelling of 6403260220551 in words is "six trillion, four hundred three billion, two hundred sixty million, two hundred twenty thousand, five hundred fifty-one".