1561453264 has 80 divisors (see below), whose sum is σ = 3787257600. Its totient is φ = 608090112.

The previous prime is 1561453241. The next prime is 1561453273. The reversal of 1561453264 is 4623541651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41077 + ... + 69355.

It is an arithmetic number, because the mean of its divisors is an integer number (47340720).

Almost surely, 2^1561453264 is an apocalyptic number.

1561453264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1561453264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1893628800).

1561453264 is an abundant number, since it is smaller than the sum of its proper divisors (2225804336).

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

1561453264 is a wasteful number, since it uses less digits than its factorization.

1561453264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28340 (or 28334 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 1561453264 is about 39515.2282544338. The cubic root of 1561453264 is about 1160.1380295521.

The spelling of 1561453264 in words is "one billion, five hundred sixty-one million, four hundred fifty-three thousand, two hundred sixty-four".