9990613692691 has 2 divisors, whose sum is σ = 9990613692692. Its totient is φ = 9990613692690.

The previous prime is 9990613692617. The next prime is 9990613692701. The reversal of 9990613692691 is 1962963160999.

It is a strong prime.

It is an emirp because it is prime and its reverse (1962963160999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9990613692691 - 2²³ = 9990605304083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9990613692691.

It is not a weakly prime, because it can be changed into another prime (9990613692611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995306846345 + 4995306846346.

It is an arithmetic number, because the mean of its divisors is an integer number (4995306846346).

Almost surely, 2^{9990613692691} is an apocalyptic number.

9990613692691 is a deficient number, since it is larger than the sum of its proper divisors (1).

9990613692691 is an equidigital number, since it uses as much as digits as its factorization.

9990613692691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76527504, while the sum is 70.

The spelling of 9990613692691 in words is "nine trillion, nine hundred ninety billion, six hundred thirteen million, six hundred ninety-two thousand, six hundred ninety-one".