15561202404 has 48 divisors (see below), whose sum is σ = 40531518720. Its totient is φ = 4605851040.

The previous prime is 15561202379. The next prime is 15561202409. The reversal of 15561202404 is 40420216551.

It is not an unprimeable number, because it can be changed into a prime (15561202409) 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, 1365114 + ... + 1376465.

It is an arithmetic number, because the mean of its divisors is an integer number (844406640).

Almost surely, 2^15561202404 is an apocalyptic number.

It is an amenable number.

15561202404 is an abundant number, since it is smaller than the sum of its proper divisors (24970316316).

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

15561202404 is a wasteful number, since it uses less digits than its factorization.

15561202404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741640 (or 2741638 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 15561202404 its reverse (40420216551), we get a palindrome (55981418955).

The spelling of 15561202404 in words is "fifteen billion, five hundred sixty-one million, two hundred two thousand, four hundred four".