90788872062890 has 16 divisors (see below), whose sum is σ = 163427217445800. Its totient is φ = 36313938217920.

The previous prime is 90788872062853. The next prime is 90788872062893. The reversal of 90788872062890 is 9826027888709.

90788872062890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 90420567514729 + 368304548161 = 9508973^2 + 606881^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90788872062893) 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, 201089141 + ... + 201540120.

Almost surely, 2^{90788872062890} is an apocalyptic number.

90788872062890 is a deficient number, since it is larger than the sum of its proper divisors (72638345382910).

90788872062890 is a wasteful number, since it uses less digits than its factorization.

90788872062890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402651817.

The product of its (nonzero) digits is 390168576, while the sum is 74.

The spelling of 90788872062890 in words is "ninety trillion, seven hundred eighty-eight billion, eight hundred seventy-two million, sixty-two thousand, eight hundred ninety".