51213632894 has 8 divisors (see below), whose sum is σ = 79298528448. Its totient is φ = 24780790080.

The previous prime is 51213632891. The next prime is 51213632903. The reversal of 51213632894 is 49823631215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51213632891) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 413013107 + ... + 413013230.

It is an arithmetic number, because the mean of its divisors is an integer number (9912316056).

Almost surely, 2^51213632894 is an apocalyptic number.

51213632894 is a deficient number, since it is larger than the sum of its proper divisors (28084895554).

51213632894 is a wasteful number, since it uses less digits than its factorization.

51213632894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826026370.

The product of its digits is 311040, while the sum is 44.

The spelling of 51213632894 in words is "fifty-one billion, two hundred thirteen million, six hundred thirty-two thousand, eight hundred ninety-four".