15565200256551 has 32 divisors (see below), whose sum is σ = 22878906794496. Its totient is φ = 9334517760000.

The previous prime is 15565200256523. The next prime is 15565200256607.

15565200256551 is nontrivially palindromic in base 10.

15565200256551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15565200256551 - 2⁷ = 15565200256423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15565200256551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15565200256951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4796530 + ... + 7357791.

It is an arithmetic number, because the mean of its divisors is an integer number (714965837328).

Almost surely, 2^{15565200256551} is an apocalyptic number.

15565200256551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15565200256551 is a deficient number, since it is larger than the sum of its proper divisors (7313706537945).

15565200256551 is a wasteful number, since it uses less digits than its factorization.

15565200256551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12154743.

The product of its (nonzero) digits is 2250000, while the sum is 48.

The spelling of 15565200256551 in words is "fifteen trillion, five hundred sixty-five billion, two hundred million, two hundred fifty-six thousand, five hundred fifty-one".