51120663772455 has 48 divisors (see below), whose sum is σ = 91754420153760. Its totient is φ = 26298420422400.

The previous prime is 51120663772433. The next prime is 51120663772457. The reversal of 51120663772455 is 55427736602115.

It is a happy number.

51120663772455 is a `hidden beast` number, since 5 + 1 + 1 + 20 + 6 + 6 + 377 + 245 + 5 = 666.

It is not a de Polignac number, because 51120663772455 - 2⁹ = 51120663771943 is a prime.

It is a super-2 number, since 2×51120663772455² (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51120663772457) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17851201 + ... + 20516010.

It is an arithmetic number, because the mean of its divisors is an integer number (1911550419870).

Almost surely, 2^{51120663772455} is an apocalyptic number.

51120663772455 is a deficient number, since it is larger than the sum of its proper divisors (40633756381305).

51120663772455 is a wasteful number, since it uses less digits than its factorization.

51120663772455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38368272 (or 38368269 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 54.

The spelling of 51120663772455 in words is "fifty-one trillion, one hundred twenty billion, six hundred sixty-three million, seven hundred seventy-two thousand, four hundred fifty-five".