1561374474 has 32 divisors (see below), whose sum is σ = 3421289664. Its totient is φ = 471108480.

The previous prime is 1561374467. The next prime is 1561374491. The reversal of 1561374474 is 4744731651.

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, 35389 + ... + 66144.

It is an arithmetic number, because the mean of its divisors is an integer number (106915302).

Almost surely, 2^1561374474 is an apocalyptic number.

1561374474 is an abundant number, since it is smaller than the sum of its proper divisors (1859915190).

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

1561374474 is a wasteful number, since it uses less digits than its factorization.

1561374474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101782.

The product of its digits is 282240, while the sum is 42.

The square root of 1561374474 is about 39514.2312844373. The cubic root of 1561374474 is about 1160.1185159330.

The spelling of 1561374474 in words is "one billion, five hundred sixty-one million, three hundred seventy-four thousand, four hundred seventy-four".