78296977969287 has 64 divisors (see below), whose sum is σ = 131816604057600. Its totient is φ = 40154922737280.

The previous prime is 78296977969283. The next prime is 78296977969297.

78296977969287 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78296977969287 - 2² = 78296977969283 is a prime.

It is a super-2 number, since 2×78296977969287² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78296977969194 and 78296977969203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78296977969283) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 188797764 + ... + 189212022.

It is an arithmetic number, because the mean of its divisors is an integer number (2059634438400).

Almost surely, 2^{78296977969287} is an apocalyptic number.

78296977969287 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78296977969287 is a deficient number, since it is larger than the sum of its proper divisors (53519626088313).

78296977969287 is a wasteful number, since it uses less digits than its factorization.

78296977969287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424716.

The product of its digits is 145179288576, while the sum is 96.

The spelling of 78296977969287 in words is "seventy-eight trillion, two hundred ninety-six billion, nine hundred seventy-seven million, nine hundred sixty-nine thousand, two hundred eighty-seven".