51766020731 has 12 divisors (see below), whose sum is σ = 55220360160. Its totient is φ = 48517042560.

The previous prime is 51766020727. The next prime is 51766020737. The reversal of 51766020731 is 13702066715.

It is not a de Polignac number, because 51766020731 - 2² = 51766020727 is a prime.

It is a super-2 number, since 2×51766020731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51766020737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305660 + ... + 443801.

It is an arithmetic number, because the mean of its divisors is an integer number (4601696680).

Almost surely, 2^51766020731 is an apocalyptic number.

51766020731 is a deficient number, since it is larger than the sum of its proper divisors (3454339429).

51766020731 is a wasteful number, since it uses less digits than its factorization.

51766020731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749734 (or 749717 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 51766020731 in words is "fifty-one billion, seven hundred sixty-six million, twenty thousand, seven hundred thirty-one".