1561455032 has 32 divisors (see below), whose sum is σ = 3101781600. Its totient is φ = 734367744.

The previous prime is 1561455031. The next prime is 1561455041. The reversal of 1561455032 is 2305541651.

It is a self number, because there is not a number n which added to its sum of digits gives 1561455032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561455031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429173 + ... + 432795.

It is an arithmetic number, because the mean of its divisors is an integer number (96930675).

Almost surely, 2^1561455032 is an apocalyptic number.

It is an amenable number.

1561455032 is a deficient number, since it is larger than the sum of its proper divisors (1540326568).

1561455032 is a wasteful number, since it uses less digits than its factorization.

1561455032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6815 (or 6811 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 1561455032 is about 39515.2506255496. The cubic root of 1561455032 is about 1160.1384674184.

Adding to 1561455032 its reverse (2305541651), we get a palindrome (3866996683).

The spelling of 1561455032 in words is "one billion, five hundred sixty-one million, four hundred fifty-five thousand, thirty-two".