125561616 has 40 divisors (see below), whose sum is σ = 325812480. Its totient is φ = 41667456.

The previous prime is 125561599. The next prime is 125561621. The reversal of 125561616 is 616165521.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5281 + ... + 16703.

It is an arithmetic number, because the mean of its divisors is an integer number (8145312).

Almost surely, 2^125561616 is an apocalyptic number.

125561616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

125561616 is an abundant number, since it is smaller than the sum of its proper divisors (200250864).

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

125561616 is a wasteful number, since it uses less digits than its factorization.

125561616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11663 (or 11657 counting only the distinct ones).

The product of its digits is 10800, while the sum is 33.

The square root of 125561616 is about 11205.4279704079. The cubic root of 125561616 is about 500.7477026575.

The spelling of 125561616 in words is "one hundred twenty-five million, five hundred sixty-one thousand, six hundred sixteen".