99409792619691 has 48 divisors (see below), whose sum is σ = 152000477890560. Its totient is φ = 62521561872000.

The previous prime is 99409792619639. The next prime is 99409792619759. The reversal of 99409792619691 is 19691629790499.

99409792619691 is a `hidden beast` number, since 9 + 9 + 409 + 7 + 92 + 61 + 9 + 69 + 1 = 666.

It is not a de Polignac number, because 99409792619691 - 2¹⁰ = 99409792618667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99409792619691.

It is not an unprimeable number, because it can be changed into a prime (99409792619191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26430345 + ... + 29956346.

It is an arithmetic number, because the mean of its divisors is an integer number (3166676622720).

Almost surely, 2^{99409792619691} is an apocalyptic number.

99409792619691 is a deficient number, since it is larger than the sum of its proper divisors (52590685270869).

99409792619691 is a wasteful number, since it uses less digits than its factorization.

99409792619691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56386888 (or 56386885 counting only the distinct ones).

The product of its (nonzero) digits is 1071385056, while the sum is 81.

The spelling of 99409792619691 in words is "ninety-nine trillion, four hundred nine billion, seven hundred ninety-two million, six hundred nineteen thousand, six hundred ninety-one".