125744073521 has 16 divisors (see below), whose sum is σ = 138170375808. Its totient is φ = 113486054400.

The previous prime is 125744073491. The next prime is 125744073523. The reversal of 125744073521 is 125370447521.

It is a cyclic number.

It is not a de Polignac number, because 125744073521 - 2¹⁰ = 125744072497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125744073523) 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, 973091 + ... + 1094711.

It is an arithmetic number, because the mean of its divisors is an integer number (8635648488).

Almost surely, 2^125744073521 is an apocalyptic number.

125744073521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125744073521 is a deficient number, since it is larger than the sum of its proper divisors (12426302287).

125744073521 is a wasteful number, since it uses less digits than its factorization.

125744073521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122312.

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 125744073521 in words is "one hundred twenty-five billion, seven hundred forty-four million, seventy-three thousand, five hundred twenty-one".