90191748013 has 4 divisors (see below), whose sum is σ = 90204495840. Its totient is φ = 90179000188.

The previous prime is 90191748011. The next prime is 90191748041. The reversal of 90191748013 is 31084719109.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90191748013 - 2¹ = 90191748011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90191748011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6363295 + ... + 6377452.

It is an arithmetic number, because the mean of its divisors is an integer number (22551123960).

Almost surely, 2^90191748013 is an apocalyptic number.

It is an amenable number.

90191748013 is a deficient number, since it is larger than the sum of its proper divisors (12747827).

90191748013 is a wasteful number, since it uses less digits than its factorization.

90191748013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12747826.

The product of its (nonzero) digits is 54432, while the sum is 43.

The spelling of 90191748013 in words is "ninety billion, one hundred ninety-one million, seven hundred forty-eight thousand, thirteen".