51425633012 has 48 divisors (see below), whose sum is σ = 105121536912. Its totient is φ = 21793873920.

The previous prime is 51425633009. The next prime is 51425633069. The reversal of 51425633012 is 21033652415.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4594941796 + 46830691216 = 67786^2 + 216404^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51425633012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673193 + ... + 745680.

It is an arithmetic number, because the mean of its divisors is an integer number (2190032019).

Almost surely, 2^51425633012 is an apocalyptic number.

51425633012 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51425633012 is an abundant number, since it is smaller than the sum of its proper divisors (53695903900).

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

51425633012 is a wasteful number, since it uses less digits than its factorization.

51425633012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418948 (or 1418946 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 51425633012 in words is "fifty-one billion, four hundred twenty-five million, six hundred thirty-three thousand, twelve".