126401632512 has 72 divisors (see below), whose sum is σ = 339743705280. Its totient is φ = 41716684800.

The previous prime is 126401632451. The next prime is 126401632537. The reversal of 126401632512 is 215236104621.

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 in 7 ways as a sum of consecutive naturals, for example, 737212 + ... + 892347.

Almost surely, 2^126401632512 is an apocalyptic number.

126401632512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

126401632512 is an abundant number, since it is smaller than the sum of its proper divisors (213342072768).

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

126401632512 is a wasteful number, since it uses less digits than its factorization.

126401632512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629679 (or 1629665 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 126401632512 in words is "one hundred twenty-six billion, four hundred one million, six hundred thirty-two thousand, five hundred twelve".