1015557055650 has 72 divisors (see below), whose sum is σ = 2872066644720. Its totient is φ = 256561780320.

The previous prime is 1015557055649. The next prime is 1015557055687. The reversal of 1015557055650 is 565507555101.

1015557055650 is a `hidden beast` number, since 1 + 0 + 15 + 5 + 5 + 70 + 5 + 565 + 0 = 666.

It is a super-2 number, since 2×1015557055650² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1015557055596 and 1015557055605.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 59380752 + ... + 59397851.

It is an arithmetic number, because the mean of its divisors is an integer number (39889814510).

Almost surely, 2^{1015557055650} is an apocalyptic number.

1015557055650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1015557055650 is an abundant number, since it is smaller than the sum of its proper divisors (1856509589070).

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

1015557055650 is a wasteful number, since it uses less digits than its factorization.

1015557055650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118778640 (or 118778632 counting only the distinct ones).

The product of its (nonzero) digits is 656250, while the sum is 45.

The spelling of 1015557055650 in words is "one trillion, fifteen billion, five hundred fifty-seven million, fifty-five thousand, six hundred fifty".