90878187201012 has 36 divisors (see below), whose sum is σ = 229727751036420. Its totient is φ = 30291688766592.

The previous prime is 90878187200923. The next prime is 90878187201029. The reversal of 90878187201012 is 21010278187809.

It can be written as a sum of positive squares in 2 ways, for example, as 6504519756816 + 84373667444196 = 2550396^2 + 9185514^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 90878187201012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42282643 + ... + 44379930.

Almost surely, 2^{90878187201012} is an apocalyptic number.

It is an amenable number.

90878187201012 is an abundant number, since it is smaller than the sum of its proper divisors (138849563835408).

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

90878187201012 is a wasteful number, since it uses less digits than its factorization.

90878187201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86691712 (or 86691707 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 54.

The spelling of 90878187201012 in words is "ninety trillion, eight hundred seventy-eight billion, one hundred eighty-seven million, two hundred one thousand, twelve".