15804512655 has 48 divisors (see below), whose sum is σ = 27788706720. Its totient is φ = 7659624448.

The previous prime is 15804512653. The next prime is 15804512657. The reversal of 15804512655 is 55621540851.

It is a Cunningham number, because it is equal to 125716²-1.

It is an interprime number because it is at equal distance from previous prime (15804512653) and next prime (15804512657).

It is not a de Polignac number, because 15804512655 - 2¹ = 15804512653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15804512653) 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 47 ways as a sum of consecutive naturals, for example, 62857 + ... + 188573.

It is an arithmetic number, because the mean of its divisors is an integer number (578931390).

Almost surely, 2^15804512655 is an apocalyptic number.

15804512655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15804512655 is a deficient number, since it is larger than the sum of its proper divisors (11984194065).

15804512655 is a wasteful number, since it uses less digits than its factorization.

15804512655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125788 (or 125771 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 42.

The spelling of 15804512655 in words is "fifteen billion, eight hundred four million, five hundred twelve thousand, six hundred fifty-five".