90878187201013 has 8 divisors (see below), whose sum is σ = 93808132879032. Its totient is φ = 87973177231296.

The previous prime is 90878187200923. The next prime is 90878187201029. The reversal of 90878187201013 is 31010278187809.

It can be written as a sum of positive squares in 4 ways, for example, as 61283956157649 + 29594231043364 = 7828407^2 + 5440058^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90878187201013 - 2²¹ = 90878185103861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90878187201083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6233919670 + ... + 6233934247.

It is an arithmetic number, because the mean of its divisors is an integer number (11726016609879).

Almost surely, 2^{90878187201013} is an apocalyptic number.

It is an amenable number.

90878187201013 is a deficient number, since it is larger than the sum of its proper divisors (2929945678019).

90878187201013 is a wasteful number, since it uses less digits than its factorization.

90878187201013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12467854151.

The product of its (nonzero) digits is 1354752, while the sum is 55.

The spelling of 90878187201013 in words is "ninety trillion, eight hundred seventy-eight billion, one hundred eighty-seven million, two hundred one thousand, thirteen".