1561602417 has 8 divisors (see below), whose sum is σ = 2087631840. Its totient is φ = 1038320640.

The previous prime is 1561602409. The next prime is 1561602443. The reversal of 1561602417 is 7142061651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1561602417 - 2³ = 1561602409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1561602487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685584 + ... + 687857.

It is an arithmetic number, because the mean of its divisors is an integer number (260953980).

Almost surely, 2^1561602417 is an apocalyptic number.

It is an amenable number.

1561602417 is a deficient number, since it is larger than the sum of its proper divisors (526029423).

1561602417 is a wasteful number, since it uses less digits than its factorization.

1561602417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373823.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1561602417 is about 39517.1154944285. The cubic root of 1561602417 is about 1160.1749679099.

The spelling of 1561602417 in words is "one billion, five hundred sixty-one million, six hundred two thousand, four hundred seventeen".