51496578947 has 16 divisors (see below), whose sum is σ = 57720363264. Its totient is φ = 45530892000.

The previous prime is 51496578907. The next prime is 51496578953. The reversal of 51496578947 is 74987569415.

It is a de Polignac number, because none of the positive numbers 2^k-51496578947 is a prime.

It is a super-4 number, since 4×51496578947⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51496578907) 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, 1005122 + ... + 1055112.

It is an arithmetic number, because the mean of its divisors is an integer number (3607522704).

Almost surely, 2^51496578947 is an apocalyptic number.

51496578947 is a deficient number, since it is larger than the sum of its proper divisors (6223784317).

51496578947 is a wasteful number, since it uses less digits than its factorization.

51496578947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52570.

The product of its digits is 76204800, while the sum is 65.

The spelling of 51496578947 in words is "fifty-one billion, four hundred ninety-six million, five hundred seventy-eight thousand, nine hundred forty-seven".