3561387880 has 64 divisors (see below), whose sum is σ = 8297556480. Its totient is φ = 1374278400.

The previous prime is 3561387871. The next prime is 3561387887. The reversal of 3561387880 is 887831653.

3561387880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3561387887) 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, 406102 + ... + 414778.

It is an arithmetic number, because the mean of its divisors is an integer number (129649320).

Almost surely, 2^3561387880 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 3561387880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4148778240).

3561387880 is an abundant number, since it is smaller than the sum of its proper divisors (4736168600).

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

3561387880 is a wasteful number, since it uses less digits than its factorization.

3561387880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050 (or 9046 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 3561387880 is about 59677.3648882053. The cubic root of 3561387880 is about 1527.1197439487.

The spelling of 3561387880 in words is "three billion, five hundred sixty-one million, three hundred eighty-seven thousand, eight hundred eighty".