1956883681 has 8 divisors (see below), whose sum is σ = 1999831680. Its totient is φ = 1913990448.

The previous prime is 1956883679. The next prime is 1956883699. The reversal of 1956883681 is 1863886591.

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 1956883681 - 2¹ = 1956883679 is a prime.

It is a super-2 number, since 2×1956883681² = 7658787481928219522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1956883601) 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, 63235 + ... + 88951.

It is an arithmetic number, because the mean of its divisors is an integer number (249978960).

Almost surely, 2^1956883681 is an apocalyptic number.

It is an amenable number.

1956883681 is a deficient number, since it is larger than the sum of its proper divisors (42947999).

1956883681 is a wasteful number, since it uses less digits than its factorization.

1956883681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27383.

The product of its digits is 2488320, while the sum is 55.

The square root of 1956883681 is about 44236.6780059263. The cubic root of 1956883681 is about 1250.8013381227.

The spelling of 1956883681 in words is "one billion, nine hundred fifty-six million, eight hundred eighty-three thousand, six hundred eighty-one".