78306256895 has 32 divisors (see below), whose sum is σ = 101504188800. Its totient is φ = 57815138304.

The previous prime is 78306256891. The next prime is 78306256907. The reversal of 78306256895 is 59865260387.

It is a cyclic number.

It is not a de Polignac number, because 78306256895 - 2² = 78306256891 is a prime.

It is a super-2 number, since 2×78306256895² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78306256891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5358719 + ... + 5373311.

It is an arithmetic number, because the mean of its divisors is an integer number (3172005900).

Almost surely, 2^78306256895 is an apocalyptic number.

78306256895 is a deficient number, since it is larger than the sum of its proper divisors (23197931905).

78306256895 is a wasteful number, since it uses less digits than its factorization.

78306256895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16259.

The product of its (nonzero) digits is 21772800, while the sum is 59.

The spelling of 78306256895 in words is "seventy-eight billion, three hundred six million, two hundred fifty-six thousand, eight hundred ninety-five".