90551787020 has 12 divisors (see below), whose sum is σ = 190158752784. Its totient is φ = 36220714800.

The previous prime is 90551787017. The next prime is 90551787031. The reversal of 90551787020 is 2078715509.

It is a super-2 number, since 2×90551787020² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2263794656 + ... + 2263794695.

It is an arithmetic number, because the mean of its divisors is an integer number (15846562732).

Almost surely, 2^90551787020 is an apocalyptic number.

It is an amenable number.

90551787020 is an abundant number, since it is smaller than the sum of its proper divisors (99606965764).

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

90551787020 is a wasteful number, since it uses less digits than its factorization.

90551787020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527589360 (or 4527589358 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 44.

The spelling of 90551787020 in words is "ninety billion, five hundred fifty-one million, seven hundred eighty-seven thousand, twenty".