1561625395 has 24 divisors (see below), whose sum is σ = 2065160160. Its totient is φ = 1132771200.

The previous prime is 1561625381. The next prime is 1561625419. The reversal of 1561625395 is 5935261651.

It is not a de Polignac number, because 1561625395 - 2¹³ = 1561617203 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244290 + ... + 250600.

It is an arithmetic number, because the mean of its divisors is an integer number (86048340).

Almost surely, 2^1561625395 is an apocalyptic number.

1561625395 is a deficient number, since it is larger than the sum of its proper divisors (503534765).

1561625395 is a wasteful number, since it uses less digits than its factorization.

1561625395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6747 (or 6736 counting only the distinct ones).

The product of its digits is 243000, while the sum is 43.

The square root of 1561625395 is about 39517.4062281420. The cubic root of 1561625395 is about 1160.1806582976.

The spelling of 1561625395 in words is "one billion, five hundred sixty-one million, six hundred twenty-five thousand, three hundred ninety-five".