51595640745 has 32 divisors (see below), whose sum is σ = 90261264384. Its totient is φ = 24959563200.

The previous prime is 51595640729. The next prime is 51595640773. The reversal of 51595640745 is 54704659515.

It is not a de Polignac number, because 51595640745 - 2⁴ = 51595640729 is a prime.

It is a super-2 number, since 2×51595640745² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 279841 + ... + 426030.

It is an arithmetic number, because the mean of its divisors is an integer number (2820664512).

Almost surely, 2^51595640745 is an apocalyptic number.

51595640745 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51595640745 is a deficient number, since it is larger than the sum of its proper divisors (38665623639).

51595640745 is a wasteful number, since it uses less digits than its factorization.

51595640745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706333.

The product of its (nonzero) digits is 3780000, while the sum is 51.

The spelling of 51595640745 in words is "fifty-one billion, five hundred ninety-five million, six hundred forty thousand, seven hundred forty-five".