1959674620681 has 4 divisors (see below), whose sum is σ = 1959919251664. Its totient is φ = 1959429989700.

The previous prime is 1959674620663. The next prime is 1959674620693. The reversal of 1959674620681 is 1860264769591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1959674620681 is a prime.

It is a super-2 number, since 2×1959674620681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1959674620181) 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 3 ways as a sum of consecutive naturals, for example, 122303475 + ... + 122319496.

It is an arithmetic number, because the mean of its divisors is an integer number (489979812916).

Almost surely, 2^{1959674620681} is an apocalyptic number.

It is an amenable number.

1959674620681 is a deficient number, since it is larger than the sum of its proper divisors (244630983).

1959674620681 is an equidigital number, since it uses as much as digits as its factorization.

1959674620681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244630982.

The product of its (nonzero) digits is 39191040, while the sum is 64.

The spelling of 1959674620681 in words is "one trillion, nine hundred fifty-nine billion, six hundred seventy-four million, six hundred twenty thousand, six hundred eighty-one".