3656072505 has 16 divisors (see below), whose sum is σ = 5929850880. Its totient is φ = 1923193728.

The previous prime is 3656072503. The next prime is 3656072507. The reversal of 3656072505 is 5052706563.

It is an interprime number because it is at equal distance from previous prime (3656072503) and next prime (3656072507).

It is not a de Polignac number, because 3656072505 - 2¹ = 3656072503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3656072501) 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, 1668345 + ... + 1670534.

It is an arithmetic number, because the mean of its divisors is an integer number (370615680).

Almost surely, 2^3656072505 is an apocalyptic number.

It is an amenable number.

3656072505 is a deficient number, since it is larger than the sum of its proper divisors (2273778375).

3656072505 is a wasteful number, since it uses less digits than its factorization.

3656072505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338960.

The product of its (nonzero) digits is 189000, while the sum is 39.

The square root of 3656072505 is about 60465.4653914116. The cubic root of 3656072505 is about 1540.5351073757.

The spelling of 3656072505 in words is "three billion, six hundred fifty-six million, seventy-two thousand, five hundred five".