1056736861 has 8 divisors (see below), whose sum is σ = 1080019584. Its totient is φ = 1033487520.

The previous prime is 1056736859. The next prime is 1056736867. The reversal of 1056736861 is 1686376501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1056736861 - 2¹ = 1056736859 is a prime.

It is a super-2 number, since 2×1056736861² = 2233385586792266642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056736867) 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 7 ways as a sum of consecutive naturals, for example, 62121 + ... + 77281.

It is an arithmetic number, because the mean of its divisors is an integer number (135002448).

Almost surely, 2^1056736861 is an apocalyptic number.

It is an amenable number.

1056736861 is a deficient number, since it is larger than the sum of its proper divisors (23282723).

1056736861 is a wasteful number, since it uses less digits than its factorization.

1056736861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16691.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1056736861 is about 32507.4893063122. The cubic root of 1056736861 is about 1018.5654770320.

The spelling of 1056736861 in words is "one billion, fifty-six million, seven hundred thirty-six thousand, eight hundred sixty-one".