51898764737 has 4 divisors (see below), whose sum is σ = 52105532976. Its totient is φ = 51691996500.

The previous prime is 51898764719. The next prime is 51898764751. The reversal of 51898764737 is 73746789815.

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 a cyclic number.

It is not a de Polignac number, because 51898764737 - 2³² = 47603797441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51898764937) 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, 103383743 + ... + 103384244.

It is an arithmetic number, because the mean of its divisors is an integer number (13026383244).

Almost surely, 2^51898764737 is an apocalyptic number.

It is an amenable number.

51898764737 is a deficient number, since it is larger than the sum of its proper divisors (206768239).

51898764737 is a wasteful number, since it uses less digits than its factorization.

51898764737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206768238.

The product of its digits is 71124480, while the sum is 65.

The spelling of 51898764737 in words is "fifty-one billion, eight hundred ninety-eight million, seven hundred sixty-four thousand, seven hundred thirty-seven".