51633121494 has 8 divisors (see below), whose sum is σ = 103266243000. Its totient is φ = 17211040496.

The previous prime is 51633121493. The next prime is 51633121499. The reversal of 51633121494 is 49412133615.

It is a sphenic number, since it is the product of 3 distinct primes.

51633121494 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51633121493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4302760119 + ... + 4302760130.

It is an arithmetic number, because the mean of its divisors is an integer number (12908280375).

Almost surely, 2^51633121494 is an apocalyptic number.

51633121494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51633121494 is a wasteful number, since it uses less digits than its factorization.

51633121494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8605520254.

The product of its digits is 77760, while the sum is 39.

It can be divided in two parts, 51633121 and 494, that added together give a palindrome (51633615).

The spelling of 51633121494 in words is "fifty-one billion, six hundred thirty-three million, one hundred twenty-one thousand, four hundred ninety-four".