61669599190992 has 100 divisors (see below), whose sum is σ = 192219689743620. Its totient is φ = 18975261284352.

The previous prime is 61669599190939. The next prime is 61669599190993. The reversal of 61669599190992 is 29909199596616.

61669599190992 is a `hidden beast` number, since 6 + 1 + 6 + 6 + 9 + 599 + 19 + 0 + 9 + 9 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28267256356416 + 33402342834576 = 5316696^2 + 5779476^2 .

It is a super-2 number, since 2×61669599190992² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61669599190993) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1830158817 + ... + 1830192512.

Almost surely, 2^{61669599190992} is an apocalyptic number.

It is an amenable number.

61669599190992 is an abundant number, since it is smaller than the sum of its proper divisors (130550090552628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61669599190992 is a wasteful number, since it uses less digits than its factorization.

61669599190992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660351362 (or 3660351347 counting only the distinct ones).

The product of its (nonzero) digits is 1147912560, while the sum is 81.

The spelling of 61669599190992 in words is "sixty-one trillion, six hundred sixty-nine billion, five hundred ninety-nine million, one hundred ninety thousand, nine hundred ninety-two".