1561835652 has 48 divisors (see below), whose sum is σ = 3934557312. Its totient is φ = 479347200.

The previous prime is 1561835633. The next prime is 1561835683. The reversal of 1561835652 is 2565381651.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50073 + ... + 75039.

It is an arithmetic number, because the mean of its divisors is an integer number (81969944).

Almost surely, 2^1561835652 is an apocalyptic number.

1561835652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561835652 is an abundant number, since it is smaller than the sum of its proper divisors (2372721660).

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

1561835652 is a wasteful number, since it uses less digits than its factorization.

1561835652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25388 (or 25386 counting only the distinct ones).

The product of its digits is 216000, while the sum is 42.

The square root of 1561835652 is about 39520.0664473126. The cubic root of 1561835652 is about 1160.2327248087.

The spelling of 1561835652 in words is "one billion, five hundred sixty-one million, eight hundred thirty-five thousand, six hundred fifty-two".