3736620636 has 144 divisors (see below), whose sum is σ = 10853055360. Its totient is φ = 994654080.

The previous prime is 3736620533. The next prime is 3736620637. The reversal of 3736620636 is 6360266373.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3736620637) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 678751 + ... + 684233.

It is an arithmetic number, because the mean of its divisors is an integer number (75368440).

Almost surely, 2^3736620636 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 3736620636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5426527680).

3736620636 is an abundant number, since it is smaller than the sum of its proper divisors (7116434724).

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

3736620636 is a wasteful number, since it uses less digits than its factorization.

3736620636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5584 (or 5575 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 42.

The square root of 3736620636 is about 61127.9039064812. The cubic root of 3736620636 is about 1551.7663714426.

The spelling of 3736620636 in words is "three billion, seven hundred thirty-six million, six hundred twenty thousand, six hundred thirty-six".