125571565680 has 320 divisors, whose sum is σ = 435057868800. Its totient is φ = 29700367360.

The previous prime is 125571565657. The next prime is 125571565697. The reversal of 125571565680 is 86565175521.

It is a happy number.

It is a congruent number.

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, 44543311 + ... + 44546129.

It is an arithmetic number, because the mean of its divisors is an integer number (1359555840).

Almost surely, 2^125571565680 is an apocalyptic number.

125571565680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125571565680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217528934400).

125571565680 is an abundant number, since it is smaller than the sum of its proper divisors (309486303120).

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

125571565680 is a wasteful number, since it uses less digits than its factorization.

125571565680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252 (or 3246 counting only the distinct ones).

The product of its (nonzero) digits is 2520000, while the sum is 51.

The spelling of 125571565680 in words is "one hundred twenty-five billion, five hundred seventy-one million, five hundred sixty-five thousand, six hundred eighty".