1561379562 has 48 divisors (see below), whose sum is σ = 3416330112. Its totient is φ = 515354400.

The previous prime is 1561379557. The next prime is 1561379563. The reversal of 1561379562 is 2659731651.

1561379562 is a `hidden beast` number, since 1 + 5 + 6 + 13 + 79 + 562 = 666.

It is a super-2 number, since 2×1561379562² = 4875812273262623688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1561379563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1078323 + ... + 1079769.

It is an arithmetic number, because the mean of its divisors is an integer number (71173544).

Almost surely, 2^1561379562 is an apocalyptic number.

1561379562 is an abundant number, since it is smaller than the sum of its proper divisors (1854950550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561379562 is a wasteful number, since it uses less digits than its factorization.

1561379562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003 (or 2000 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 1561379562 is about 39514.2956662522. The cubic root of 1561379562 is about 1160.1197760784.

The spelling of 1561379562 in words is "one billion, five hundred sixty-one million, three hundred seventy-nine thousand, five hundred sixty-two".