61656800869663 has 8 divisors (see below), whose sum is σ = 61860482017776. Its totient is φ = 61453283654400.

The previous prime is 61656800869649. The next prime is 61656800869669. The reversal of 61656800869663 is 36696800865616.

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 61656800869663 - 2²¹ = 61656798772511 is a prime.

It is a super-2 number, since 2×61656800869663² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61656800869592 and 61656800869601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61656800869669) 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, 40229728 + ... + 41734213.

It is an arithmetic number, because the mean of its divisors is an integer number (7732560252222).

Almost surely, 2^{61656800869663} is an apocalyptic number.

61656800869663 is a deficient number, since it is larger than the sum of its proper divisors (203681148113).

61656800869663 is a wasteful number, since it uses less digits than its factorization.

61656800869663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81966425.

The product of its (nonzero) digits is 403107840, while the sum is 70.

The spelling of 61656800869663 in words is "sixty-one trillion, six hundred fifty-six billion, eight hundred million, eight hundred sixty-nine thousand, six hundred sixty-three".