155615105550 has 48 divisors (see below), whose sum is σ = 391361058432. Its totient is φ = 40912888800.

The previous prime is 155615105543. The next prime is 155615105573. The reversal of 155615105550 is 55501516551.

It is a super-2 number, since 2×155615105550² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155615105499 and 155615105508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7295224 + ... + 7316523.

It is an arithmetic number, because the mean of its divisors is an integer number (8153355384).

Almost surely, 2^155615105550 is an apocalyptic number.

155615105550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155615105550 is an abundant number, since it is smaller than the sum of its proper divisors (235745952882).

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

155615105550 is a wasteful number, since it uses less digits than its factorization.

155615105550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14611833 (or 14611828 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 39.

The spelling of 155615105550 in words is "one hundred fifty-five billion, six hundred fifteen million, one hundred five thousand, five hundred fifty".