90690643098 has 72 divisors (see below), whose sum is σ = 226235763936. Its totient is φ = 26035570800.

The previous prime is 90690643093. The next prime is 90690643151. The reversal of 90690643098 is 89034609609.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (90690643091) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 562918 + ... + 705873.

It is an arithmetic number, because the mean of its divisors is an integer number (3142163388).

Almost surely, 2^90690643098 is an apocalyptic number.

90690643098 is an abundant number, since it is smaller than the sum of its proper divisors (135545120838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90690643098 is a wasteful number, since it uses less digits than its factorization.

90690643098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268848 (or 1268826 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The spelling of 90690643098 in words is "ninety billion, six hundred ninety million, six hundred forty-three thousand, ninety-eight".