3640772047571 has 4 divisors (see below), whose sum is σ = 3641872979832. Its totient is φ = 3639671115312.

The previous prime is 3640772047547. The next prime is 3640772047579. The reversal of 3640772047571 is 1757402770463.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3640772047571 is a prime.

It is a super-2 number, since 2×3640772047571² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640772047579) 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, 550461170 + ... + 550467783.

It is an arithmetic number, because the mean of its divisors is an integer number (910468244958).

Almost surely, 2^{3640772047571} is an apocalyptic number.

3640772047571 is a deficient number, since it is larger than the sum of its proper divisors (1100932261).

3640772047571 is a wasteful number, since it uses less digits than its factorization.

3640772047571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100932260.

The product of its (nonzero) digits is 6914880, while the sum is 53.

The spelling of 3640772047571 in words is "three trillion, six hundred forty billion, seven hundred seventy-two million, forty-seven thousand, five hundred seventy-one".