125639697642 has 16 divisors (see below), whose sum is σ = 251482546272. Its totient is φ = 41846040720.

The previous prime is 125639697641. The next prime is 125639697661. The reversal of 125639697642 is 246796936521.

It is not an unprimeable number, because it can be changed into a prime (125639697641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8456584 + ... + 8471427.

It is an arithmetic number, because the mean of its divisors is an integer number (15717659142).

Almost surely, 2^125639697642 is an apocalyptic number.

125639697642 is an abundant number, since it is smaller than the sum of its proper divisors (125842848630).

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

125639697642 is a wasteful number, since it uses less digits than its factorization.

125639697642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16929253.

The product of its digits is 29393280, while the sum is 60.

The spelling of 125639697642 in words is "one hundred twenty-five billion, six hundred thirty-nine million, six hundred ninety-seven thousand, six hundred forty-two".