3644540718 has 96 divisors (see below), whose sum is σ = 9151744896. Its totient is φ = 959055552.

The previous prime is 3644540687. The next prime is 3644540747. The reversal of 3644540718 is 8170454463.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 3644540718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2456805 + ... + 2458287.

It is an arithmetic number, because the mean of its divisors is an integer number (95330676).

Almost surely, 2^3644540718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3644540718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4575872448).

3644540718 is an abundant number, since it is smaller than the sum of its proper divisors (5507204178).

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

3644540718 is a wasteful number, since it uses less digits than its factorization.

3644540718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158 (or 2151 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 3644540718 is about 60370.0316216581. The cubic root of 3644540718 is about 1538.9137105143.

The spelling of 3644540718 in words is "three billion, six hundred forty-four million, five hundred forty thousand, seven hundred eighteen".