90219708720 has 60 divisors (see below), whose sum is σ = 302987857536. Its totient is φ = 24058588800.

The previous prime is 90219708581. The next prime is 90219708757. The reversal of 90219708720 is 2780791209.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62651856 + ... + 62653295.

Almost surely, 2^90219708720 is an apocalyptic number.

90219708720 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

90219708720 is an abundant number, since it is smaller than the sum of its proper divisors (212768148816).

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

90219708720 is a wasteful number, since it uses less digits than its factorization.

90219708720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125305170 (or 125305161 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 90219708720 in words is "ninety billion, two hundred nineteen million, seven hundred eight thousand, seven hundred twenty".