642125575412 has 6 divisors (see below), whose sum is σ = 1123719756978. Its totient is φ = 321062787704.

The previous prime is 642125575391. The next prime is 642125575433. The reversal of 642125575412 is 214575521246.

It is an interprime number because it is at equal distance from previous prime (642125575391) and next prime (642125575433).

It can be written as a sum of positive squares in only one way, i.e., 378613779856 + 263511795556 = 615316^2 + 513334^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80265696923 + ... + 80265696930.

It is an arithmetic number, because the mean of its divisors is an integer number (187286626163).

Almost surely, 2^642125575412 is an apocalyptic number.

It is an amenable number.

642125575412 is a deficient number, since it is larger than the sum of its proper divisors (481594181566).

642125575412 is a wasteful number, since it uses less digits than its factorization.

642125575412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160531393857 (or 160531393855 counting only the distinct ones).

The product of its digits is 672000, while the sum is 44.

The spelling of 642125575412 in words is "six hundred forty-two billion, one hundred twenty-five million, five hundred seventy-five thousand, four hundred twelve".