51454728623 has 4 divisors (see below), whose sum is σ = 53229029640. Its totient is φ = 49680427608.

The previous prime is 51454728613. The next prime is 51454728629. The reversal of 51454728623 is 32682745415.

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 51454728623 - 2²⁸ = 51186293167 is a prime.

It is a super-2 number, since 2×51454728623² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51454728629) 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, 887150465 + ... + 887150522.

It is an arithmetic number, because the mean of its divisors is an integer number (13307257410).

Almost surely, 2^51454728623 is an apocalyptic number.

51454728623 is a deficient number, since it is larger than the sum of its proper divisors (1774301017).

51454728623 is a wasteful number, since it uses less digits than its factorization.

51454728623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774301016.

The product of its digits is 1612800, while the sum is 47.

The spelling of 51454728623 in words is "fifty-one billion, four hundred fifty-four million, seven hundred twenty-eight thousand, six hundred twenty-three".