1561236364 has 6 divisors (see below), whose sum is σ = 2732163644. Its totient is φ = 780618180.

The previous prime is 1561236359. The next prime is 1561236367. The reversal of 1561236364 is 4636321651.

It is not an unprimeable number, because it can be changed into a prime (1561236367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195154542 + ... + 195154549.

Almost surely, 2^1561236364 is an apocalyptic number.

It is an amenable number.

1561236364 is a deficient number, since it is larger than the sum of its proper divisors (1170927280).

1561236364 is a wasteful number, since it uses less digits than its factorization.

1561236364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390309095 (or 390309093 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 1561236364 is about 39512.4836475765. The cubic root of 1561236364 is about 1160.0843091715.

The spelling of 1561236364 in words is "one billion, five hundred sixty-one million, two hundred thirty-six thousand, three hundred sixty-four".