15820402655 has 16 divisors (see below), whose sum is σ = 19157964384. Its totient is φ = 12541132800.

The previous prime is 15820402627. The next prime is 15820402709. The reversal of 15820402655 is 55620402851.

It is not a de Polignac number, because 15820402655 - 2²⁰ = 15819354079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245855 + ... + 303455.

It is an arithmetic number, because the mean of its divisors is an integer number (1197372774).

Almost surely, 2^15820402655 is an apocalyptic number.

15820402655 is a deficient number, since it is larger than the sum of its proper divisors (3337561729).

15820402655 is a wasteful number, since it uses less digits than its factorization.

15820402655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58106.

The product of its (nonzero) digits is 96000, while the sum is 38.

The spelling of 15820402655 in words is "fifteen billion, eight hundred twenty million, four hundred two thousand, six hundred fifty-five".