3561721032 has 64 divisors (see below), whose sum is σ = 8983800000. Its totient is φ = 1176678144.

The previous prime is 3561721001. The next prime is 3561721039. The reversal of 3561721032 is 2301271653.

It is a super-2 number, since 2×3561721032² = 25371713419582290048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3561721039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2298594 + ... + 2300142.

It is an arithmetic number, because the mean of its divisors is an integer number (140371875).

Almost surely, 2^3561721032 is an apocalyptic number.

It is an amenable number.

3561721032 is an abundant number, since it is smaller than the sum of its proper divisors (5422078968).

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

3561721032 is a wasteful number, since it uses less digits than its factorization.

3561721032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350 (or 2346 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 3561721032 is about 59680.1560989916. The cubic root of 3561721032 is about 1527.1673608844.

Adding to 3561721032 its reverse (2301271653), we get a palindrome (5862992685).

The spelling of 3561721032 in words is "three billion, five hundred sixty-one million, seven hundred twenty-one thousand, thirty-two".