51342637973 has 4 divisors (see below), whose sum is σ = 56010150528. Its totient is φ = 46675125420.

The previous prime is 51342637963. The next prime is 51342637981. The reversal of 51342637973 is 37973624315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51342637973 - 2⁶ = 51342637909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51342637933) 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, 2333756261 + ... + 2333756282.

It is an arithmetic number, because the mean of its divisors is an integer number (14002537632).

Almost surely, 2^51342637973 is an apocalyptic number.

It is an amenable number.

51342637973 is a deficient number, since it is larger than the sum of its proper divisors (4667512555).

51342637973 is a wasteful number, since it uses less digits than its factorization.

51342637973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667512554.

The product of its digits is 2857680, while the sum is 50.

The spelling of 51342637973 in words is "fifty-one billion, three hundred forty-two million, six hundred thirty-seven thousand, nine hundred seventy-three".