125455011521 has 16 divisors (see below), whose sum is σ = 144852900864. Its totient is φ = 106431637824.

The previous prime is 125455011509. The next prime is 125455011547. The reversal of 125455011521 is 125110554521.

It is a cyclic number.

It is not a de Polignac number, because 125455011521 - 2⁶ = 125455011457 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125455016521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37775 + ... + 502331.

It is an arithmetic number, because the mean of its divisors is an integer number (9053306304).

Almost surely, 2^125455011521 is an apocalyptic number.

It is an amenable number.

125455011521 is a deficient number, since it is larger than the sum of its proper divisors (19397889343).

125455011521 is a wasteful number, since it uses less digits than its factorization.

125455011521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464960.

The product of its (nonzero) digits is 10000, while the sum is 32.

The spelling of 125455011521 in words is "one hundred twenty-five billion, four hundred fifty-five million, eleven thousand, five hundred twenty-one".