3651263616 has 768 divisors, whose sum is σ = 14065228800. Its totient is φ = 823173120.

The previous prime is 3651263591. The next prime is 3651263657. The reversal of 3651263616 is 6163621563.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 61885795 + ... + 61885853.

It is an arithmetic number, because the mean of its divisors is an integer number (18314100).

Almost surely, 2^3651263616 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 3651263616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7032614400).

3651263616 is an abundant number, since it is smaller than the sum of its proper divisors (10413965184).

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

3651263616 is a wasteful number, since it uses less digits than its factorization.

3651263616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 118 counting only the distinct ones).

The product of its digits is 116640, while the sum is 39.

The square root of 3651263616 is about 60425.6867234457. The cubic root of 3651263616 is about 1539.8593810997.

It can be divided in two parts, 36512 and 63616, that added together give a triangular number (100128 = T₄₄₇).

The spelling of 3651263616 in words is "three billion, six hundred fifty-one million, two hundred sixty-three thousand, six hundred sixteen".