51723211377 has 16 divisors (see below), whose sum is σ = 75097224000. Its totient is φ = 31540832064.

The previous prime is 51723211349. The next prime is 51723211391. The reversal of 51723211377 is 77311232715.

It is not a de Polignac number, because 51723211377 - 2⁶ = 51723211313 is a prime.

It is a super-2 number, since 2×51723211377² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51723211277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15643602 + ... + 15646907.

It is an arithmetic number, because the mean of its divisors is an integer number (4693576500).

Almost surely, 2^51723211377 is an apocalyptic number.

51723211377 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

51723211377 is a deficient number, since it is larger than the sum of its proper divisors (23374012623).

51723211377 is a wasteful number, since it uses less digits than its factorization.

51723211377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31290560.

The product of its digits is 61740, while the sum is 39.

The spelling of 51723211377 in words is "fifty-one billion, seven hundred twenty-three million, two hundred eleven thousand, three hundred seventy-seven".