90015066213778 has 8 divisors (see below), whose sum is σ = 135520837695360. Its totient is φ = 44841453648660.

The previous prime is 90015066213731. The next prime is 90015066213781. The reversal of 90015066213778 is 87731266051009.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83039728438 + ... + 83039729521.

It is an arithmetic number, because the mean of its divisors is an integer number (16940104711920).

Almost surely, 2^{90015066213778} is an apocalyptic number.

90015066213778 is a deficient number, since it is larger than the sum of its proper divisors (45505771481582).

90015066213778 is a wasteful number, since it uses less digits than its factorization.

90015066213778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166079458232.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 90015066213778 in words is "ninety trillion, fifteen billion, sixty-six million, two hundred thirteen thousand, seven hundred seventy-eight".