78820140267 has 96 divisors (see below), whose sum is σ = 129928541184. Its totient is φ = 45628761600.

The previous prime is 78820140233. The next prime is 78820140299. The reversal of 78820140267 is 76204102887.

It is not a de Polignac number, because 78820140267 - 2²² = 78815945963 is a prime.

It is a super-2 number, since 2×78820140267² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78820140767) 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 95 ways as a sum of consecutive naturals, for example, 38884108 + ... + 38886134.

It is an arithmetic number, because the mean of its divisors is an integer number (1353422304).

Almost surely, 2^78820140267 is an apocalyptic number.

78820140267 is a deficient number, since it is larger than the sum of its proper divisors (51108400917).

78820140267 is a wasteful number, since it uses less digits than its factorization.

78820140267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289 (or 2286 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The spelling of 78820140267 in words is "seventy-eight billion, eight hundred twenty million, one hundred forty thousand, two hundred sixty-seven".