956718778679 has 4 divisors (see below), whose sum is σ = 965660075784. Its totient is φ = 947777481576.

The previous prime is 956718778633. The next prime is 956718778681. The reversal of 956718778679 is 976877817659.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976877817659 = 877 ⋅1113885767.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-956718778679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (956718778579) 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, 4470648392 + ... + 4470648605.

It is an arithmetic number, because the mean of its divisors is an integer number (241415018946).

Almost surely, 2^956718778679 is an apocalyptic number.

956718778679 is a deficient number, since it is larger than the sum of its proper divisors (8941297105).

956718778679 is a wasteful number, since it uses less digits than its factorization.

956718778679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8941297104.

The product of its digits is 2240421120, while the sum is 80.

The spelling of 956718778679 in words is "nine hundred fifty-six billion, seven hundred eighteen million, seven hundred seventy-eight thousand, six hundred seventy-nine".