3656445131772 has 36 divisors (see below), whose sum is σ = 9242765813736. Its totient is φ = 1218803826720.

The previous prime is 3656445131771. The next prime is 3656445131813. The reversal of 3656445131772 is 2771315446563.

3656445131772 is a `hidden beast` number, since 3 + 6 + 5 + 6 + 44 + 513 + 17 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656445131771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4113622 + ... + 4922882.

It is an arithmetic number, because the mean of its divisors is an integer number (256743494826).

Almost surely, 2^{3656445131772} is an apocalyptic number.

It is an amenable number.

3656445131772 is an abundant number, since it is smaller than the sum of its proper divisors (5586320681964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3656445131772 is a wasteful number, since it uses less digits than its factorization.

3656445131772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934778 (or 934773 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 54.

The spelling of 3656445131772 in words is "three trillion, six hundred fifty-six billion, four hundred forty-five million, one hundred thirty-one thousand, seven hundred seventy-two".