125656660644210 has 128 divisors (see below), whose sum is σ = 338468350671360. Its totient is φ = 33170301923328.

The previous prime is 125656660644199. The next prime is 125656660644223. The reversal of 125656660644210 is 12446066656521.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71240062 + ... + 72982598.

It is an arithmetic number, because the mean of its divisors is an integer number (2644283989620).

Almost surely, 2^{125656660644210} is an apocalyptic number.

125656660644210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 125656660644210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169234175335680).

125656660644210 is an abundant number, since it is smaller than the sum of its proper divisors (212811690027150).

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

125656660644210 is a wasteful number, since it uses less digits than its factorization.

125656660644210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745249 (or 1745243 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 54.

The spelling of 125656660644210 in words is "one hundred twenty-five trillion, six hundred fifty-six billion, six hundred sixty million, six hundred forty-four thousand, two hundred ten".