51120057757 has 12 divisors (see below), whose sum is σ = 55628506836. Its totient is φ = 46939496960.

The previous prime is 51120057701. The next prime is 51120057767. The reversal of 51120057757 is 75775002115.

It can be written as a sum of positive squares in 6 ways, for example, as 666362596 + 50453695161 = 25814^2 + 224619^2 .

It is not a de Polignac number, because 51120057757 - 2¹⁹ = 51119533469 is a prime.

It is a super-2 number, since 2×51120057757² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51120057767) 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, 2145298 + ... + 2168995.

It is an arithmetic number, because the mean of its divisors is an integer number (4635708903).

Almost surely, 2^51120057757 is an apocalyptic number.

It is an amenable number.

51120057757 is a deficient number, since it is larger than the sum of its proper divisors (4508449079).

51120057757 is a wasteful number, since it uses less digits than its factorization.

51120057757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314368 (or 4314351 counting only the distinct ones).

The product of its (nonzero) digits is 85750, while the sum is 40.

The spelling of 51120057757 in words is "fifty-one billion, one hundred twenty million, fifty-seven thousand, seven hundred fifty-seven".