78896064947 has 16 divisors (see below), whose sum is σ = 94108900032. Its totient is φ = 64730964480.

The previous prime is 78896064937. The next prime is 78896064959. The reversal of 78896064947 is 74946069887.

It is not a de Polignac number, because 78896064947 - 2²⁰ = 78895016371 is a prime.

It is a super-2 number, since 2×78896064947² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78896064937) 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 15 ways as a sum of consecutive naturals, for example, 2578178 + ... + 2608599.

It is an arithmetic number, because the mean of its divisors is an integer number (5881806252).

Almost surely, 2^78896064947 is an apocalyptic number.

78896064947 is a deficient number, since it is larger than the sum of its proper divisors (15212835085).

78896064947 is a wasteful number, since it uses less digits than its factorization.

78896064947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5186878.

The product of its (nonzero) digits is 146313216, while the sum is 68.

The spelling of 78896064947 in words is "seventy-eight billion, eight hundred ninety-six million, sixty-four thousand, nine hundred forty-seven".