125421466656 has 96 divisors (see below), whose sum is σ = 349205472000. Its totient is φ = 39304362240.

The previous prime is 125421466631. The next prime is 125421466673. The reversal of 125421466656 is 656664124521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23506 + ... + 501393.

It is an arithmetic number, because the mean of its divisors is an integer number (3637557000).

Almost surely, 2^125421466656 is an apocalyptic number.

125421466656 is a gapful number since it is divisible by the number (16) 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 125421466656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174602736000).

125421466656 is an abundant number, since it is smaller than the sum of its proper divisors (223784005344).

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

125421466656 is a wasteful number, since it uses less digits than its factorization.

125421466656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525062 (or 525054 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 48.

The spelling of 125421466656 in words is "one hundred twenty-five billion, four hundred twenty-one million, four hundred sixty-six thousand, six hundred fifty-six".