90378663500 has 24 divisors (see below), whose sum is σ = 197387002176. Its totient is φ = 36151465200.

The previous prime is 90378663499. The next prime is 90378663509. The reversal of 90378663500 is 536687309.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (90378663509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90378164 + ... + 90379163.

It is an arithmetic number, because the mean of its divisors is an integer number (8224458424).

Almost surely, 2^90378663500 is an apocalyptic number.

It is an amenable number.

90378663500 is an abundant number, since it is smaller than the sum of its proper divisors (107008338676).

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

90378663500 is a wasteful number, since it uses less digits than its factorization.

90378663500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180757346 (or 180757334 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 90378663500 in words is "ninety billion, three hundred seventy-eight million, six hundred sixty-three thousand, five hundred".