51385568954 has 8 divisors (see below), whose sum is σ = 77088453300. Its totient is φ = 25689417856.

The previous prime is 51385568953. The next prime is 51385568981. The reversal of 51385568954 is 45986558315.

It can be written as a sum of positive squares in 2 ways, for example, as 34661130625 + 16724438329 = 186175^2 + 129323^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 51385568893 and 51385568902.

It is not an unprimeable number, because it can be changed into a prime (51385568953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1664189 + ... + 1694784.

Almost surely, 2^51385568954 is an apocalyptic number.

51385568954 is a deficient number, since it is larger than the sum of its proper divisors (25702884346).

51385568954 is a wasteful number, since it uses less digits than its factorization.

51385568954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366624.

The product of its digits is 25920000, while the sum is 59.

The spelling of 51385568954 in words is "fifty-one billion, three hundred eighty-five million, five hundred sixty-eight thousand, nine hundred fifty-four".