1561040354 has 16 divisors (see below), whose sum is σ = 2356591776. Its totient is φ = 775526400.

The previous prime is 1561040321. The next prime is 1561040387. The reversal of 1561040354 is 4530401651.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1561040321) and next prime (1561040387).

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, 199394 + ... + 207074.

It is an arithmetic number, because the mean of its divisors is an integer number (147286986).

Almost surely, 2^1561040354 is an apocalyptic number.

1561040354 is a deficient number, since it is larger than the sum of its proper divisors (795551422).

1561040354 is a wasteful number, since it uses less digits than its factorization.

1561040354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8321.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1561040354 is about 39510.0032143760. The cubic root of 1561040354 is about 1160.0357584102.

The spelling of 1561040354 in words is "one billion, five hundred sixty-one million, forty thousand, three hundred fifty-four".