125656513550 has 48 divisors (see below), whose sum is σ = 237174355584. Its totient is φ = 49520940000.

The previous prime is 125656513513. The next prime is 125656513561. The reversal of 125656513550 is 55315656521.

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, 5565785 + ... + 5588315.

It is an arithmetic number, because the mean of its divisors is an integer number (4941132408).

Almost surely, 2^125656513550 is an apocalyptic number.

125656513550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125656513550 is a deficient number, since it is larger than the sum of its proper divisors (111517842034).

125656513550 is a wasteful number, since it uses less digits than its factorization.

125656513550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24185 (or 24180 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 125656513550 in words is "one hundred twenty-five billion, six hundred fifty-six million, five hundred thirteen thousand, five hundred fifty".