90720120263 has 4 divisors (see below), whose sum is σ = 92257749480. Its totient is φ = 89182491048.

The previous prime is 90720120247. The next prime is 90720120269. The reversal of 90720120263 is 36202102709.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90720120263 - 2⁴ = 90720120247 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 (90720120269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768814520 + ... + 768814637.

It is an arithmetic number, because the mean of its divisors is an integer number (23064437370).

Almost surely, 2^90720120263 is an apocalyptic number.

90720120263 is a deficient number, since it is larger than the sum of its proper divisors (1537629217).

90720120263 is a wasteful number, since it uses less digits than its factorization.

90720120263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537629216.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 90720120263 in words is "ninety billion, seven hundred twenty million, one hundred twenty thousand, two hundred sixty-three".