155387315655 has 128 divisors (see below), whose sum is σ = 328188672000. Its totient is φ = 68761820160.

The previous prime is 155387315641. The next prime is 155387315731. The reversal of 155387315655 is 556513783551.

155387315655 is a `hidden beast` number, since 1 + 5 + 5 + 3 + 8 + 73 + 1 + 565 + 5 = 666.

155387315655 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 155387315655 - 2¹³ = 155387307463 is a prime.

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 1672926 + ... + 1763364.

It is an arithmetic number, because the mean of its divisors is an integer number (2563974000).

Almost surely, 2^155387315655 is an apocalyptic number.

155387315655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155387315655 is an abundant number, since it is smaller than the sum of its proper divisors (172801356345).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155387315655 is a wasteful number, since it uses less digits than its factorization.

155387315655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90566 (or 90560 counting only the distinct ones).

The product of its digits is 9450000, while the sum is 54.

The spelling of 155387315655 in words is "one hundred fifty-five billion, three hundred eighty-seven million, three hundred fifteen thousand, six hundred fifty-five".