1561627413 has 12 divisors (see below), whose sum is σ = 2276379820. Its totient is φ = 1031533056.

The previous prime is 1561627363. The next prime is 1561627421. The reversal of 1561627413 is 3147261651.

1561627413 is a `hidden beast` number, since 1 + 5 + 616 + 27 + 4 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1273205124 + 288422289 = 35682^2 + 16983^2 .

It is not a de Polignac number, because 1561627413 - 2¹³ = 1561619221 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 (1561627453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 794956 + ... + 796917.

Almost surely, 2^1561627413 is an apocalyptic number.

It is an amenable number.

1561627413 is a deficient number, since it is larger than the sum of its proper divisors (714752407).

1561627413 is a wasteful number, since it uses less digits than its factorization.

1561627413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591988 (or 1591985 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 1561627413 is about 39517.4317611861. The cubic root of 1561627413 is about 1160.1811580427.

The spelling of 1561627413 in words is "one billion, five hundred sixty-one million, six hundred twenty-seven thousand, four hundred thirteen".