90880437693 has 16 divisors (see below), whose sum is σ = 125089208640. Its totient is φ = 58654251264.

The previous prime is 90880437643. The next prime is 90880437709. The reversal of 90880437693 is 39673408809.

It is a happy number.

It is not a de Polignac number, because 90880437693 - 2⁶ = 90880437629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90880437643) 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, 3102678 + ... + 3131831.

It is an arithmetic number, because the mean of its divisors is an integer number (7818075540).

Almost surely, 2^90880437693 is an apocalyptic number.

It is an amenable number.

90880437693 is a deficient number, since it is larger than the sum of its proper divisors (34208770947).

90880437693 is a wasteful number, since it uses less digits than its factorization.

90880437693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6234668.

The product of its (nonzero) digits is 7838208, while the sum is 57.

The spelling of 90880437693 in words is "ninety billion, eight hundred eighty million, four hundred thirty-seven thousand, six hundred ninety-three".