90815135811 has 8 divisors (see below), whose sum is σ = 121970693904. Its totient is φ = 60101500800.

The previous prime is 90815135783. The next prime is 90815135819. The reversal of 90815135811 is 11853151809.

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

It is not a de Polignac number, because 90815135811 - 2¹⁴ = 90815119427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90815135819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110480290 + ... + 110481111.

It is an arithmetic number, because the mean of its divisors is an integer number (15246336738).

Almost surely, 2^90815135811 is an apocalyptic number.

90815135811 is a deficient number, since it is larger than the sum of its proper divisors (31155558093).

90815135811 is a wasteful number, since it uses less digits than its factorization.

90815135811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220961541.

The product of its (nonzero) digits is 43200, while the sum is 42.

The spelling of 90815135811 in words is "ninety billion, eight hundred fifteen million, one hundred thirty-five thousand, eight hundred eleven".