51356562074 has 4 divisors (see below), whose sum is σ = 77034843114. Its totient is φ = 25678281036.

The previous prime is 51356562073. The next prime is 51356562091. The reversal of 51356562074 is 47026565315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 48754848025 + 2601714049 = 220805^2 + 51007^2 .

It is not an unprimeable number, because it can be changed into a prime (51356562073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12839140517 + ... + 12839140520.

Almost surely, 2^51356562074 is an apocalyptic number.

51356562074 is a deficient number, since it is larger than the sum of its proper divisors (25678281040).

51356562074 is a wasteful number, since it uses less digits than its factorization.

51356562074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25678281039.

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 51356562074 in words is "fifty-one billion, three hundred fifty-six million, five hundred sixty-two thousand, seventy-four".