125623733520 has 80 divisors (see below), whose sum is σ = 402862340160. Its totient is φ = 32344499712.

The previous prime is 125623733467. The next prime is 125623733537. The reversal of 125623733520 is 25337326521.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9017734 + ... + 9031653.

It is an arithmetic number, because the mean of its divisors is an integer number (5035779252).

Almost surely, 2^125623733520 is an apocalyptic number.

125623733520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125623733520 is an abundant number, since it is smaller than the sum of its proper divisors (277238606640).

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

125623733520 is a wasteful number, since it uses less digits than its factorization.

125623733520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18049432 (or 18049426 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 39.

The spelling of 125623733520 in words is "one hundred twenty-five billion, six hundred twenty-three million, seven hundred thirty-three thousand, five hundred twenty".