51683777511553 has 16 divisors (see below), whose sum is σ = 57316680247680. Its totient is φ = 46206875260800.

The previous prime is 51683777511491. The next prime is 51683777511563. The reversal of 51683777511553 is 35511577738615.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51683777511553 is a prime.

It is a super-2 number, since 2×51683777511553² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51683777511563) 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, 2952325 + ... + 10586962.

It is an arithmetic number, because the mean of its divisors is an integer number (3582292515480).

Almost surely, 2^{51683777511553} is an apocalyptic number.

It is an amenable number.

51683777511553 is a deficient number, since it is larger than the sum of its proper divisors (5632902736127).

51683777511553 is a wasteful number, since it uses less digits than its factorization.

51683777511553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13545048.

The product of its digits is 92610000, while the sum is 64.

The spelling of 51683777511553 in words is "fifty-one trillion, six hundred eighty-three billion, seven hundred seventy-seven million, five hundred eleven thousand, five hundred fifty-three".