3618557712 has 640 divisors, whose sum is σ = 14056243200. Its totient is φ = 873400320.

The previous prime is 3618557711. The next prime is 3618557717. The reversal of 3618557712 is 2177558163.

It is a happy number.

3618557712 is a `hidden beast` number, since 3 + 61 + 8 + 5 + 577 + 12 = 666.

It is not an unprimeable number, because it can be changed into a prime (3618557711) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 45804489 + ... + 45804567.

It is an arithmetic number, because the mean of its divisors is an integer number (21962880).

Almost surely, 2^3618557712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3618557712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7028121600).

3618557712 is an abundant number, since it is smaller than the sum of its proper divisors (10437685488).

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

3618557712 is a wasteful number, since it uses less digits than its factorization.

3618557712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 119 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 3618557712 is about 60154.4488130346. The cubic root of 3618557712 is about 1535.2478617385.

The spelling of 3618557712 in words is "three billion, six hundred eighteen million, five hundred fifty-seven thousand, seven hundred twelve".