51399948914 has 4 divisors (see below), whose sum is σ = 77099923374. Its totient is φ = 25699974456.

The previous prime is 51399948883. The next prime is 51399948917. The reversal of 51399948914 is 41984999315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45302994025 + 6096954889 = 212845^2 + 78083^2 .

It is not an unprimeable number, because it can be changed into a prime (51399948917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12849987227 + ... + 12849987230.

Almost surely, 2^51399948914 is an apocalyptic number.

51399948914 is a deficient number, since it is larger than the sum of its proper divisors (25699974460).

51399948914 is a wasteful number, since it uses less digits than its factorization.

51399948914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25699974459.

The product of its digits is 12597120, while the sum is 62.

The spelling of 51399948914 in words is "fifty-one billion, three hundred ninety-nine million, nine hundred forty-eight thousand, nine hundred fourteen".