51196664475 has 72 divisors (see below), whose sum is σ = 100707282000. Its totient is φ = 24655852800.

The previous prime is 51196664473. The next prime is 51196664501. The reversal of 51196664475 is 57446669115.

It is not a de Polignac number, because 51196664475 - 2¹ = 51196664473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51196664471) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 299361 + ... + 438189.

It is an arithmetic number, because the mean of its divisors is an integer number (1398712250).

Almost surely, 2^51196664475 is an apocalyptic number.

51196664475 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51196664475 is a deficient number, since it is larger than the sum of its proper divisors (49510617525).

51196664475 is a wasteful number, since it uses less digits than its factorization.

51196664475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139005 (or 138997 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 51196664475 in words is "fifty-one billion, one hundred ninety-six million, six hundred sixty-four thousand, four hundred seventy-five".