155508118887 has 32 divisors (see below), whose sum is σ = 228763054080. Its totient is φ = 93182076000.

The previous prime is 155508118873. The next prime is 155508118891. The reversal of 155508118887 is 788811805551.

It is a happy number.

It is not a de Polignac number, because 155508118887 - 2⁶ = 155508118823 is a prime.

It is a super-2 number, since 2×155508118887² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155508118807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1105164 + ... + 1237902.

It is an arithmetic number, because the mean of its divisors is an integer number (7148845440).

Almost surely, 2^155508118887 is an apocalyptic number.

155508118887 is a deficient number, since it is larger than the sum of its proper divisors (73254935193).

155508118887 is a wasteful number, since it uses less digits than its factorization.

155508118887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133155.

The product of its (nonzero) digits is 3584000, while the sum is 57.

The spelling of 155508118887 in words is "one hundred fifty-five billion, five hundred eight million, one hundred eighteen thousand, eight hundred eighty-seven".