1956989966287 has 2 divisors, whose sum is σ = 1956989966288. Its totient is φ = 1956989966286.

The previous prime is 1956989966273. The next prime is 1956989966303. The reversal of 1956989966287 is 7826699896591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1956989966287 - 2¹⁵ = 1956989933519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1956989966207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978494983143 + 978494983144.

It is an arithmetic number, because the mean of its divisors is an integer number (978494983144).

Almost surely, 2^{1956989966287} is an apocalyptic number.

1956989966287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956989966287 is an equidigital number, since it uses as much as digits as its factorization.

1956989966287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6348948480, while the sum is 85.

The spelling of 1956989966287 in words is "one trillion, nine hundred fifty-six billion, nine hundred eighty-nine million, nine hundred sixty-six thousand, two hundred eighty-seven".