51172432753 has 4 divisors (see below), whose sum is σ = 55108773748. Its totient is φ = 47236091760.

The previous prime is 51172432739. The next prime is 51172432777. The reversal of 51172432753 is 35723427115.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11868577249 + 39303855504 = 108943^2 + 198252^2 .

It is not a de Polignac number, because 51172432753 - 2⁵ = 51172432721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51172432783) 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, 1968170478 + ... + 1968170503.

It is an arithmetic number, because the mean of its divisors is an integer number (13777193437).

Almost surely, 2^51172432753 is an apocalyptic number.

It is an amenable number.

51172432753 is a deficient number, since it is larger than the sum of its proper divisors (3936340995).

51172432753 is a wasteful number, since it uses less digits than its factorization.

51172432753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3936340994.

The product of its digits is 176400, while the sum is 40.

Adding to 51172432753 its reverse (35723427115), we get a palindrome (86895859868).

The spelling of 51172432753 in words is "fifty-one billion, one hundred seventy-two million, four hundred thirty-two thousand, seven hundred fifty-three".