126172128612 has 24 divisors (see below), whose sum is σ = 309896456800. Its totient is φ = 39843830016.

The previous prime is 126172128581. The next prime is 126172128637. The reversal of 126172128612 is 216821271621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276693037 + ... + 276693492.

Almost surely, 2^126172128612 is an apocalyptic number.

126172128612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

126172128612 is an abundant number, since it is smaller than the sum of its proper divisors (183724328188).

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

126172128612 is a wasteful number, since it uses less digits than its factorization.

126172128612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553386555 (or 553386553 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The spelling of 126172128612 in words is "one hundred twenty-six billion, one hundred seventy-two million, one hundred twenty-eight thousand, six hundred twelve".