51694711518 has 16 divisors (see below), whose sum is σ = 103451838480. Its totient is φ = 17221167936.

The previous prime is 51694711489. The next prime is 51694711547. The reversal of 51694711518 is 81511749615.

It is an interprime number because it is at equal distance from previous prime (51694711489) and next prime (51694711547).

It is a congruent number.

It is an unprimeable number.

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, 2589873 + ... + 2609756.

It is an arithmetic number, because the mean of its divisors is an integer number (6465739905).

Almost surely, 2^51694711518 is an apocalyptic number.

51694711518 is an abundant number, since it is smaller than the sum of its proper divisors (51757126962).

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

51694711518 is a wasteful number, since it uses less digits than its factorization.

51694711518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201291.

The product of its digits is 302400, while the sum is 48.

The spelling of 51694711518 in words is "fifty-one billion, six hundred ninety-four million, seven hundred eleven thousand, five hundred eighteen".