15623512465550 has 48 divisors (see below), whose sum is σ = 31702346201232. Its totient is φ = 5681130470400.

The previous prime is 15623512465507. The next prime is 15623512465567. The reversal of 15623512465550 is 5556421532651.

It is a super-2 number, since 2×15623512465550² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

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, 22199672 + ... + 22892628.

It is an arithmetic number, because the mean of its divisors is an integer number (660465545859).

Almost surely, 2^{15623512465550} is an apocalyptic number.

15623512465550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15623512465550 is an abundant number, since it is smaller than the sum of its proper divisors (16078833735682).

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

15623512465550 is a wasteful number, since it uses less digits than its factorization.

15623512465550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733973 (or 733968 counting only the distinct ones).

The product of its (nonzero) digits is 5400000, while the sum is 50.

The spelling of 15623512465550 in words is "fifteen trillion, six hundred twenty-three billion, five hundred twelve million, four hundred sixty-five thousand, five hundred fifty".