155819490655 has 16 divisors (see below), whose sum is σ = 191786421024. Its totient is φ = 121467346560.

The previous prime is 155819490643. The next prime is 155819490709. The reversal of 155819490655 is 556094918551.

It is not a de Polignac number, because 155819490655 - 2²³ = 155811102047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155819490655.

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, 770224 + ... + 951253.

It is an arithmetic number, because the mean of its divisors is an integer number (11986651314).

Almost surely, 2^155819490655 is an apocalyptic number.

155819490655 is a deficient number, since it is larger than the sum of its proper divisors (35966930369).

155819490655 is a wasteful number, since it uses less digits than its factorization.

155819490655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721946.

The product of its (nonzero) digits is 9720000, while the sum is 58.

The spelling of 155819490655 in words is "one hundred fifty-five billion, eight hundred nineteen million, four hundred ninety thousand, six hundred fifty-five".