51291534436 has 24 divisors (see below), whose sum is σ = 95110151360. Its totient is φ = 24135084000.

The previous prime is 51291534433. The next prime is 51291534439. The reversal of 51291534436 is 63443519215.

It is an interprime number because it is at equal distance from previous prime (51291534433) and next prime (51291534439).

It is a junction number, because it is equal to n+sod(n) for n = 51291534392 and 51291534401.

It is not an unprimeable number, because it can be changed into a prime (51291534433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2223255 + ... + 2246206.

Almost surely, 2^51291534436 is an apocalyptic number.

It is an amenable number.

51291534436 is a deficient number, since it is larger than the sum of its proper divisors (43818616924).

51291534436 is a wasteful number, since it uses less digits than its factorization.

51291534436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4469635 (or 4469633 counting only the distinct ones).

The product of its digits is 388800, while the sum is 43.

The spelling of 51291534436 in words is "fifty-one billion, two hundred ninety-one million, five hundred thirty-four thousand, four hundred thirty-six".