51353786645 has 16 divisors (see below), whose sum is σ = 70738316928. Its totient is φ = 35058891840.

The previous prime is 51353786639. The next prime is 51353786681. The reversal of 51353786645 is 54668735315.

It is not a de Polignac number, because 51353786645 - 2⁴ = 51353786629 is a prime.

It is a super-2 number, since 2×51353786645² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3223886 + ... + 3239775.

It is an arithmetic number, because the mean of its divisors is an integer number (4421144808).

Almost surely, 2^51353786645 is an apocalyptic number.

It is an amenable number.

51353786645 is a deficient number, since it is larger than the sum of its proper divisors (19384530283).

51353786645 is a wasteful number, since it uses less digits than its factorization.

51353786645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6463900.

The product of its digits is 9072000, while the sum is 53.

The spelling of 51353786645 in words is "fifty-one billion, three hundred fifty-three million, seven hundred eighty-six thousand, six hundred forty-five".