51111100604997 has 10 divisors (see below), whose sum is σ = 76351150286598. Its totient is φ = 34074067069944.

The previous prime is 51111100604983. The next prime is 51111100605023. The reversal of 51111100604997 is 79940600111115.

It is a happy number.

51111100604997 is a `hidden beast` number, since 5 + 11 + 11 + 10 + 0 + 604 + 9 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49342841606916 + 1768258998081 = 7024446^2 + 1329759^2 .

It is not a de Polignac number, because 51111100604997 - 2⁶ = 51111100604933 is a prime.

It is a super-2 number, since 2×51111100604997² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51111100604197) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 315500620938 + ... + 315500621099.

Almost surely, 2^{51111100604997} is an apocalyptic number.

It is an amenable number.

51111100604997 is a deficient number, since it is larger than the sum of its proper divisors (25240049681601).

51111100604997 is an equidigital number, since it uses as much as digits as its factorization.

51111100604997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631001242049 (or 631001242040 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 45.

The spelling of 51111100604997 in words is "fifty-one trillion, one hundred eleven billion, one hundred million, six hundred four thousand, nine hundred ninety-seven".