15001555655 has 4 divisors (see below), whose sum is σ = 18001866792. Its totient is φ = 12001244520.

The previous prime is 15001555651. The next prime is 15001555691. The reversal of 15001555655 is 55655510051.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 15001555655 - 2² = 15001555651 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 (15001555651) 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, 1500155561 + ... + 1500155570.

It is an arithmetic number, because the mean of its divisors is an integer number (4500466698).

Almost surely, 2^15001555655 is an apocalyptic number.

15001555655 is a deficient number, since it is larger than the sum of its proper divisors (3000311137).

15001555655 is an equidigital number, since it uses as much as digits as its factorization.

15001555655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000311136.

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 15001555655 in words is "fifteen billion, one million, five hundred fifty-five thousand, six hundred fifty-five".