90077258909 has 4 divisors (see below), whose sum is σ = 98266100640. Its totient is φ = 81888417180.

The previous prime is 90077258819. The next prime is 90077258911. The reversal of 90077258909 is 90985277009.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90077258909 is a prime.

It is a super-2 number, since 2×90077258909² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90077258959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4094420849 + ... + 4094420870.

It is an arithmetic number, because the mean of its divisors is an integer number (24566525160).

Almost surely, 2^90077258909 is an apocalyptic number.

It is an amenable number.

90077258909 is a deficient number, since it is larger than the sum of its proper divisors (8188841731).

90077258909 is a wasteful number, since it uses less digits than its factorization.

90077258909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8188841730.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The spelling of 90077258909 in words is "ninety billion, seventy-seven million, two hundred fifty-eight thousand, nine hundred nine".