1561473746 has 16 divisors (see below), whose sum is σ = 2677349376. Its totient is φ = 669068736.

The previous prime is 1561473733. The next prime is 1561473773. The reversal of 1561473746 is 6473741651.

It is a junction number, because it is equal to n+sod(n) for n = 1561473697 and 1561473706.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97370 + ... + 112266.

It is an arithmetic number, because the mean of its divisors is an integer number (167334336).

Almost surely, 2^1561473746 is an apocalyptic number.

1561473746 is a deficient number, since it is larger than the sum of its proper divisors (1115875630).

1561473746 is a wasteful number, since it uses less digits than its factorization.

1561473746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22393.

The product of its digits is 423360, while the sum is 44.

The square root of 1561473746 is about 39515.4874194916. The cubic root of 1561473746 is about 1160.1431021435.

The spelling of 1561473746 in words is "one billion, five hundred sixty-one million, four hundred seventy-three thousand, seven hundred forty-six".