634431556461212 has 24 divisors (see below), whose sum is σ = 1166779845521136. Its totient is φ = 301464649075968.

The previous prime is 634431556461203. The next prime is 634431556461277. The reversal of 634431556461212 is 212164655134436.

It is a congruent number.

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, 49845339053 + ... + 49845351780.

It is an arithmetic number, because the mean of its divisors is an integer number (48615826896714).

Almost surely, 2^{634431556461212} is an apocalyptic number.

It is an amenable number.

634431556461212 is a deficient number, since it is larger than the sum of its proper divisors (532348289059924).

634431556461212 is a wasteful number, since it uses less digits than its factorization.

634431556461212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99690690917 (or 99690690915 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 53.

The spelling of 634431556461212 in words is "six hundred thirty-four trillion, four hundred thirty-one billion, five hundred fifty-six million, four hundred sixty-one thousand, two hundred twelve".