906565552639 has 4 divisors (see below), whose sum is σ = 945981446256. Its totient is φ = 867149659024.

The previous prime is 906565552601. The next prime is 906565552693. The reversal of 906565552639 is 936255565609.

It is a happy number.

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

It is not a de Polignac number, because 906565552639 - 2²¹ = 906563455487 is a prime.

It is a super-2 number, since 2×906565552639² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906565556639) 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, 19707946774 + ... + 19707946819.

It is an arithmetic number, because the mean of its divisors is an integer number (236495361564).

Almost surely, 2^906565552639 is an apocalyptic number.

906565552639 is a deficient number, since it is larger than the sum of its proper divisors (39415893617).

906565552639 is a wasteful number, since it uses less digits than its factorization.

906565552639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39415893616.

The product of its (nonzero) digits is 65610000, while the sum is 61.

The spelling of 906565552639 in words is "nine hundred six billion, five hundred sixty-five million, five hundred fifty-two thousand, six hundred thirty-nine".