78336977963387 has 32 divisors (see below), whose sum is σ = 94386192316416. Its totient is φ = 64059655507200.

The previous prime is 78336977963357. The next prime is 78336977963393.

78336977963387 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 78336977963387 - 2³⁸ = 78062100056443 is a prime.

It is a super-2 number, since 2×78336977963387² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78336977963299 and 78336977963308.

It is not an unprimeable number, because it can be changed into a prime (78336977963357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2681393 + ... + 12800930.

It is an arithmetic number, because the mean of its divisors is an integer number (2949568509888).

Almost surely, 2^{78336977963387} is an apocalyptic number.

78336977963387 is a deficient number, since it is larger than the sum of its proper divisors (16049214353029).

78336977963387 is a wasteful number, since it uses less digits than its factorization.

78336977963387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15483251.

The product of its digits is 36294822144, while the sum is 86.

The spelling of 78336977963387 in words is "seventy-eight trillion, three hundred thirty-six billion, nine hundred seventy-seven million, nine hundred sixty-three thousand, three hundred eighty-seven".