78945966954987 has 64 divisors (see below), whose sum is σ = 119929705574400. Its totient is φ = 45725088816000.

The previous prime is 78945966954983. The next prime is 78945966954991.

78945966954987 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (78945966954983) and next prime (78945966954991).

It is not a de Polignac number, because 78945966954987 - 2² = 78945966954983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78945966954894 and 78945966954903.

It is not an unprimeable number, because it can be changed into a prime (78945966954983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5618523112 + ... + 5618537162.

It is an arithmetic number, because the mean of its divisors is an integer number (1873901649600).

Almost surely, 2^{78945966954987} is an apocalyptic number.

78945966954987 is a deficient number, since it is larger than the sum of its proper divisors (40983738619413).

78945966954987 is a wasteful number, since it uses less digits than its factorization.

78945966954987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20144.

The product of its digits is 296284262400, while the sum is 96.

The spelling of 78945966954987 in words is "seventy-eight trillion, nine hundred forty-five billion, nine hundred sixty-six million, nine hundred fifty-four thousand, nine hundred eighty-seven".