3561649704 has 80 divisors (see below), whose sum is σ = 10088169300. Its totient is φ = 1173858048.

The previous prime is 3561649699. The next prime is 3561649733. The reversal of 3561649704 is 4079461653.

It can be written as a sum of positive squares in 2 ways, for example, as 3103604100 + 458045604 = 55710^2 + 21402^2 .

It is a super-2 number, since 2×3561649704² = 25370697228006575232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3561649704.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26794 + ... + 88550.

Almost surely, 2^3561649704 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 3561649704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5044084650).

3561649704 is an abundant number, since it is smaller than the sum of its proper divisors (6526519596).

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

3561649704 is a wasteful number, since it uses less digits than its factorization.

3561649704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61864 (or 61851 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 3561649704 is about 59679.5585104314. The cubic root of 3561649704 is about 1527.1571663259.

The spelling of 3561649704 in words is "three billion, five hundred sixty-one million, six hundred forty-nine thousand, seven hundred four".