3656540412 has 72 divisors (see below), whose sum is σ = 10640544096. Its totient is φ = 1037090304.

The previous prime is 3656540411. The next prime is 3656540423. The reversal of 3656540412 is 2140456563.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656540411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18433 + ... + 87480.

Almost surely, 2^3656540412 is an apocalyptic number.

It is an amenable number.

3656540412 is an abundant number, since it is smaller than the sum of its proper divisors (6984003684).

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

3656540412 is a wasteful number, since it uses less digits than its factorization.

3656540412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106067 (or 106062 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 3656540412 is about 60469.3344762451. The cubic root of 3656540412 is about 1540.6008241989.

Adding to 3656540412 its reverse (2140456563), we get a palindrome (5796996975).

The spelling of 3656540412 in words is "three billion, six hundred fifty-six million, five hundred forty thousand, four hundred twelve".