125661605610 has 64 divisors (see below), whose sum is σ = 322376060160. Its totient is φ = 31271032320.

The previous prime is 125661605609. The next prime is 125661605627. The reversal of 125661605610 is 16506166521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2192665 + ... + 2249244.

It is an arithmetic number, because the mean of its divisors is an integer number (5037125940).

Almost surely, 2^125661605610 is an apocalyptic number.

125661605610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125661605610 is an abundant number, since it is smaller than the sum of its proper divisors (196714454550).

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

125661605610 is a wasteful number, since it uses less digits than its factorization.

125661605610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441983.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 125661605610 in words is "one hundred twenty-five billion, six hundred sixty-one million, six hundred five thousand, six hundred ten".