3651655560 has 128 divisors (see below), whose sum is σ = 12531974400. Its totient is φ = 833863680.

The previous prime is 3651655537. The next prime is 3651655583. The reversal of 3651655560 is 655561563.

It is an interprime number because it is at equal distance from previous prime (3651655537) and next prime (3651655583).

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1746996 + ... + 1749084.

It is an arithmetic number, because the mean of its divisors is an integer number (97906050).

Almost surely, 2^3651655560 is an apocalyptic number.

3651655560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3651655560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6265987200).

3651655560 is an abundant number, since it is smaller than the sum of its proper divisors (8880318840).

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

3651655560 is a wasteful number, since it uses less digits than its factorization.

3651655560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191 (or 4187 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 42.

The square root of 3651655560 is about 60428.9298266981. The cubic root of 3651655560 is about 1539.9144777379.

The spelling of 3651655560 in words is "three billion, six hundred fifty-one million, six hundred fifty-five thousand, five hundred sixty".