51616656610511 has 8 divisors (see below), whose sum is σ = 51795728360064. Its totient is φ = 51437866643800.

The previous prime is 51616656610499. The next prime is 51616656610523. The reversal of 51616656610511 is 11501665661615.

It is an interprime number because it is at equal distance from previous prime (51616656610499) and next prime (51616656610523).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51616656610511 - 2⁴² = 47218610099407 is a prime.

It is a super-2 number, since 2×51616656610511² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51616656610511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51616656610711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70078715 + ... + 70811436.

It is an arithmetic number, because the mean of its divisors is an integer number (6474466045008).

Almost surely, 2^{51616656610511} is an apocalyptic number.

51616656610511 is a deficient number, since it is larger than the sum of its proper divisors (179071749553).

51616656610511 is a wasteful number, since it uses less digits than its factorization.

51616656610511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140891421.

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 51616656610511 in words is "fifty-one trillion, six hundred sixteen billion, six hundred fifty-six million, six hundred ten thousand, five hundred eleven".