1561967682 has 16 divisors (see below), whose sum is σ = 3407929632. Its totient is φ = 473323520.

The previous prime is 1561967681. The next prime is 1561967689. The reversal of 1561967682 is 2867691651.

It is a super-2 number, since 2×1561967682² = 4879486079224906248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1561967681) 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, 11833023 + ... + 11833154.

It is an arithmetic number, because the mean of its divisors is an integer number (212995602).

Almost surely, 2^1561967682 is an apocalyptic number.

1561967682 is an abundant number, since it is smaller than the sum of its proper divisors (1845961950).

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

1561967682 is a wasteful number, since it uses less digits than its factorization.

1561967682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23666193.

The product of its digits is 1088640, while the sum is 51.

The square root of 1561967682 is about 39521.7368292437. The cubic root of 1561967682 is about 1160.2654173672.

It can be divided in two parts, 156196 and 7682, that added together give a triangular number (163878 = T₅₇₂).

The spelling of 1561967682 in words is "one billion, five hundred sixty-one million, nine hundred sixty-seven thousand, six hundred eighty-two".