90115540994 has 8 divisors (see below), whose sum is σ = 138826644348. Its totient is φ = 43839992880.

The previous prime is 90115540993. The next prime is 90115540997. The reversal of 90115540994 is 49904551109.

It can be written as a sum of positive squares in 2 ways, for example, as 87956730625 + 2158810369 = 296575^2 + 46463^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (90115540993) 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, 608888717 + ... + 608888864.

Almost surely, 2^90115540994 is an apocalyptic number.

90115540994 is a deficient number, since it is larger than the sum of its proper divisors (48711103354).

90115540994 is a wasteful number, since it uses less digits than its factorization.

90115540994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217777620.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 90115540994 in words is "ninety billion, one hundred fifteen million, five hundred forty thousand, nine hundred ninety-four".