1561017852 has 48 divisors (see below), whose sum is σ = 4095866880. Its totient is φ = 514067184.

The previous prime is 1561017823. The next prime is 1561017853. The reversal of 1561017852 is 2587101651.

1561017852 is a `hidden beast` number, since 1 + 561 + 0 + 17 + 85 + 2 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561017853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78108 + ... + 96035.

It is an arithmetic number, because the mean of its divisors is an integer number (85330560).

Almost surely, 2^1561017852 is an apocalyptic number.

1561017852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561017852 is an abundant number, since it is smaller than the sum of its proper divisors (2534849028).

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

1561017852 is a wasteful number, since it uses less digits than its factorization.

1561017852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174239 (or 174231 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The square root of 1561017852 is about 39509.7184500219. The cubic root of 1561017852 is about 1160.0301845098.

The spelling of 1561017852 in words is "one billion, five hundred sixty-one million, seventeen thousand, eight hundred fifty-two".