1956740881 has 2 divisors, whose sum is σ = 1956740882. Its totient is φ = 1956740880.

The previous prime is 1956740831. The next prime is 1956740887. The reversal of 1956740881 is 1880476591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1656897025 + 299843856 = 40705^2 + 17316^2 .

It is a cyclic number.

It is not a de Polignac number, because 1956740881 - 2¹⁹ = 1956216593 is a prime.

It is a super-2 number, since 2×1956740881² = 7657669750753312322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1956740887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978370440 + 978370441.

It is an arithmetic number, because the mean of its divisors is an integer number (978370441).

Almost surely, 2^1956740881 is an apocalyptic number.

It is an amenable number.

1956740881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956740881 is an equidigital number, since it uses as much as digits as its factorization.

1956740881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 49.

The square root of 1956740881 is about 44235.0639312299. The cubic root of 1956740881 is about 1250.7709124042.

The spelling of 1956740881 in words is "one billion, nine hundred fifty-six million, seven hundred forty thousand, eight hundred eighty-one".