51436504654 has 16 divisors (see below), whose sum is σ = 79044383376. Its totient is φ = 25088500800.

The previous prime is 51436504633. The next prime is 51436504663. The reversal of 51436504654 is 45640563415.

It is a super-2 number, since 2×51436504654² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51436504654.

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, 1021489 + ... + 1070659.

It is an arithmetic number, because the mean of its divisors is an integer number (4940273961).

Almost surely, 2^51436504654 is an apocalyptic number.

51436504654 is a deficient number, since it is larger than the sum of its proper divisors (27607878722).

51436504654 is a wasteful number, since it uses less digits than its factorization.

51436504654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61971.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 51436504654 in words is "fifty-one billion, four hundred thirty-six million, five hundred four thousand, six hundred fifty-four".