3251816640 has 84 divisors (see below), whose sum is σ = 11184904224. Its totient is φ = 867150336.

The previous prime is 3251816629. The next prime is 3251816653. The reversal of 3251816640 is 466181523.

It is a happy number.

3251816640 is a `hidden beast` number, since 3 + 2 + 5 + 1 + 8 + 1 + 6 + 640 = 666.

It is a super-2 number, since 2×3251816640² = 21148622920361779200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3251816595 and 3251816604.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561672 + ... + 567431.

Almost surely, 2^3251816640 is an apocalyptic number.

3251816640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3251816640 is an abundant number, since it is smaller than the sum of its proper divisors (7933087584).

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

3251816640 is a wasteful number, since it uses less digits than its factorization.

3251816640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129126 (or 1129113 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 3251816640 is about 57024.7020158808. The cubic root of 3251816640 is about 1481.5239719690.

The spelling of 3251816640 in words is "three billion, two hundred fifty-one million, eight hundred sixteen thousand, six hundred forty".