90578863564540 has 48 divisors (see below), whose sum is σ = 215629035541920. Its totient is φ = 31684266443520.

The previous prime is 90578863564531. The next prime is 90578863564543. The reversal of 90578863564540 is 4546536887509.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90578863564540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90578863564543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9167896231 + ... + 9167906110.

It is an arithmetic number, because the mean of its divisors is an integer number (4492271573790).

Almost surely, 2^{90578863564540} is an apocalyptic number.

It is an amenable number.

90578863564540 is an abundant number, since it is smaller than the sum of its proper divisors (125050171977380).

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

90578863564540 is a wasteful number, since it uses less digits than its factorization.

90578863564540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18335802382 (or 18335802380 counting only the distinct ones).

The product of its (nonzero) digits is 870912000, while the sum is 70.

The spelling of 90578863564540 in words is "ninety trillion, five hundred seventy-eight billion, eight hundred sixty-three million, five hundred sixty-four thousand, five hundred forty".