1561473436 has 12 divisors (see below), whose sum is σ = 2736846000. Its totient is φ = 779517440.

The previous prime is 1561473413. The next prime is 1561473449. The reversal of 1561473436 is 6343741651.

It is a congruent number.

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, 301936 + ... + 307063.

It is an arithmetic number, because the mean of its divisors is an integer number (228070500).

Almost surely, 2^1561473436 is an apocalyptic number.

It is an amenable number.

1561473436 is a deficient number, since it is larger than the sum of its proper divisors (1175372564).

1561473436 is a wasteful number, since it uses less digits than its factorization.

1561473436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609644 (or 609642 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

The square root of 1561473436 is about 39515.4834969788. The cubic root of 1561473436 is about 1160.1430253689.

The spelling of 1561473436 in words is "one billion, five hundred sixty-one million, four hundred seventy-three thousand, four hundred thirty-six".