51595640747 has 16 divisors (see below), whose sum is σ = 62569976832. Its totient is φ = 41533430400.

The previous prime is 51595640729. The next prime is 51595640773. The reversal of 51595640747 is 74704659515.

It is not a de Polignac number, because 51595640747 - 2²⁰ = 51594592171 is a prime.

It is a super-2 number, since 2×51595640747² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51595640647) 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, 413129 + ... + 523322.

It is an arithmetic number, because the mean of its divisors is an integer number (3910623552).

Almost surely, 2^51595640747 is an apocalyptic number.

51595640747 is a deficient number, since it is larger than the sum of its proper divisors (10974336085).

51595640747 is a wasteful number, since it uses less digits than its factorization.

51595640747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936938.

The product of its (nonzero) digits is 5292000, while the sum is 53.

The spelling of 51595640747 in words is "fifty-one billion, five hundred ninety-five million, six hundred forty thousand, seven hundred forty-seven".