90998454564 has 24 divisors (see below), whose sum is σ = 235921919520. Its totient is φ = 30332818152.

The previous prime is 90998454559. The next prime is 90998454601. The reversal of 90998454564 is 46545489909.

90998454564 is a `hidden beast` number, since 9 + 0 + 9 + 9 + 84 + 545 + 6 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421289034 + ... + 421289249.

It is an arithmetic number, because the mean of its divisors is an integer number (9830079980).

Almost surely, 2^90998454564 is an apocalyptic number.

It is an amenable number.

90998454564 is an abundant number, since it is smaller than the sum of its proper divisors (144923464956).

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

90998454564 is a wasteful number, since it uses less digits than its factorization.

90998454564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842578296 (or 842578288 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 63.

The spelling of 90998454564 in words is "ninety billion, nine hundred ninety-eight million, four hundred fifty-four thousand, five hundred sixty-four".