90478233615 has 128 divisors (see below), whose sum is σ = 182859005952. Its totient is φ = 37109329920.

The previous prime is 90478233613. The next prime is 90478233673. The reversal of 90478233615 is 51633287409.

It is a Cunningham number, because it is equal to 300796²-1.

It is not a de Polignac number, because 90478233615 - 2¹ = 90478233613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90478233613) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 49630594 + ... + 49632416.

It is an arithmetic number, because the mean of its divisors is an integer number (1428585984).

It is a 2-persistent number, because it is pandigital, and so is 2⋅90478233615 = 180956467230, but 3⋅90478233615 = 271434700845 is not.

Almost surely, 2^90478233615 is an apocalyptic number.

90478233615 is an abundant number, since it is smaller than the sum of its proper divisors (92380772337).

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

90478233615 is a wasteful number, since it uses less digits than its factorization.

90478233615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 90478233615 in words is "ninety billion, four hundred seventy-eight million, two hundred thirty-three thousand, six hundred fifteen".