51047891653 has 16 divisors (see below), whose sum is σ = 57134246400. Its totient is φ = 45208180080.

The previous prime is 51047891633. The next prime is 51047891693. The reversal of 51047891653 is 35619874015.

It is a cyclic number.

It is not a de Polignac number, because 51047891653 - 2⁵ = 51047891621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51047891597 and 51047891606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51047891633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36888 + ... + 321646.

It is an arithmetic number, because the mean of its divisors is an integer number (3570890400).

Almost surely, 2^51047891653 is an apocalyptic number.

It is an amenable number.

51047891653 is a deficient number, since it is larger than the sum of its proper divisors (6086354747).

51047891653 is a wasteful number, since it uses less digits than its factorization.

51047891653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285192.

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 51047891653 in words is "fifty-one billion, forty-seven million, eight hundred ninety-one thousand, six hundred fifty-three".