90670856509 has 8 divisors (see below), whose sum is σ = 93621531392. Its totient is φ = 87721794720.

The previous prime is 90670856501. The next prime is 90670856513. The reversal of 90670856509 is 90565807609.

It is a happy number.

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 90670856509 - 2³ = 90670856501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90670856509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90670856501) 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, 288504 + ... + 514369.

It is an arithmetic number, because the mean of its divisors is an integer number (11702691424).

Almost surely, 2^90670856509 is an apocalyptic number.

It is an amenable number.

90670856509 is a deficient number, since it is larger than the sum of its proper divisors (2950674883).

90670856509 is a wasteful number, since it uses less digits than its factorization.

90670856509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806547.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 90670856509 in words is "ninety billion, six hundred seventy million, eight hundred fifty-six thousand, five hundred nine".