3649427778567 has 16 divisors (see below), whose sum is σ = 4899157855200. Its totient is φ = 2416328758272.

The previous prime is 3649427778559. The next prime is 3649427778569. The reversal of 3649427778567 is 7658777249463.

It is not a de Polignac number, because 3649427778567 - 2³ = 3649427778559 is a prime.

It is a super-2 number, since 2×3649427778567² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649427778569) 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, 3204603 + ... + 4191459.

It is an arithmetic number, because the mean of its divisors is an integer number (306197365950).

Almost surely, 2^{3649427778567} is an apocalyptic number.

3649427778567 is a deficient number, since it is larger than the sum of its proper divisors (1249730076633).

3649427778567 is a wasteful number, since it uses less digits than its factorization.

3649427778567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995282.

The product of its digits is 2987228160, while the sum is 75.

The spelling of 3649427778567 in words is "three trillion, six hundred forty-nine billion, four hundred twenty-seven million, seven hundred seventy-eight thousand, five hundred sixty-seven".