3651538902 has 128 divisors (see below), whose sum is σ = 8971223040. Its totient is φ = 976458240.

The previous prime is 3651538901. The next prime is 3651538909. The reversal of 3651538902 is 2098351563.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651538901) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2194923 + ... + 2196585.

It is an arithmetic number, because the mean of its divisors is an integer number (70087680).

Almost surely, 2^3651538902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3651538902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4485611520).

3651538902 is an abundant number, since it is smaller than the sum of its proper divisors (5319684138).

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

3651538902 is a wasteful number, since it uses less digits than its factorization.

3651538902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 3651538902 is about 60427.9645693945. The cubic root of 3651538902 is about 1539.8980792165.

The spelling of 3651538902 in words is "three billion, six hundred fifty-one million, five hundred thirty-eight thousand, nine hundred two".