90691291075 has 144 divisors (see below), whose sum is σ = 148100440608. Its totient is φ = 54432000000.

The previous prime is 90691291049. The next prime is 90691291087. The reversal of 90691291075 is 57019219609.

It is not a de Polignac number, because 90691291075 - 2¹³ = 90691282883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 50355175 + ... + 50356975.

It is an arithmetic number, because the mean of its divisors is an integer number (1028475282).

Almost surely, 2^90691291075 is an apocalyptic number.

90691291075 is a deficient number, since it is larger than the sum of its proper divisors (57409149533).

90691291075 is a wasteful number, since it uses less digits than its factorization.

90691291075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974 (or 1962 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 49.

The spelling of 90691291075 in words is "ninety billion, six hundred ninety-one million, two hundred ninety-one thousand, seventy-five".