1561367404 has 12 divisors (see below), whose sum is σ = 2736581904. Its totient is φ = 779486864.

The previous prime is 1561367393. The next prime is 1561367411. The reversal of 1561367404 is 4047631651.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296272 + ... + 301495.

It is an arithmetic number, because the mean of its divisors is an integer number (228048492).

Almost surely, 2^1561367404 is an apocalyptic number.

It is an amenable number.

1561367404 is a deficient number, since it is larger than the sum of its proper divisors (1175214500).

1561367404 is a wasteful number, since it uses less digits than its factorization.

1561367404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598424 (or 598422 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 1561367404 is about 39514.1418228968. The cubic root of 1561367404 is about 1160.1167649009.

The spelling of 1561367404 in words is "one billion, five hundred sixty-one million, three hundred sixty-seven thousand, four hundred four".