51437694823 has 4 divisors (see below), whose sum is σ = 52633920328. Its totient is φ = 50241469320.

The previous prime is 51437694821. The next prime is 51437694857. The reversal of 51437694823 is 32849673415.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51437694823 - 2¹ = 51437694821 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 (51437694821) 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, 598112688 + ... + 598112773.

It is an arithmetic number, because the mean of its divisors is an integer number (13158480082).

Almost surely, 2^51437694823 is an apocalyptic number.

51437694823 is a deficient number, since it is larger than the sum of its proper divisors (1196225505).

51437694823 is a wasteful number, since it uses less digits than its factorization.

51437694823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196225504.

The product of its digits is 4354560, while the sum is 52.

The spelling of 51437694823 in words is "fifty-one billion, four hundred thirty-seven million, six hundred ninety-four thousand, eight hundred twenty-three".