1561602367 has 4 divisors (see below), whose sum is σ = 1681725640. Its totient is φ = 1441479096.

The previous prime is 1561602359. The next prime is 1561602373. The reversal of 1561602367 is 7632061651.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1561602367 - 2³ = 1561602359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561602377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60061617 + ... + 60061642.

It is an arithmetic number, because the mean of its divisors is an integer number (420431410).

Almost surely, 2^1561602367 is an apocalyptic number.

1561602367 is a deficient number, since it is larger than the sum of its proper divisors (120123273).

1561602367 is a wasteful number, since it uses less digits than its factorization.

1561602367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120123272.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 1561602367 is about 39517.1148617912. The cubic root of 1561602367 is about 1160.1749555276.

The spelling of 1561602367 in words is "one billion, five hundred sixty-one million, six hundred two thousand, three hundred sixty-seven".