78767076787 has 6 divisors (see below), whose sum is σ = 91627007748. Its totient is φ = 67514637204.

The previous prime is 78767076779. The next prime is 78767076847.

78767076787 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78767076787 - 2³ = 78767076779 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78767016787) 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 5 ways as a sum of consecutive naturals, for example, 803745633 + ... + 803745730.

It is an arithmetic number, because the mean of its divisors is an integer number (15271167958).

Almost surely, 2^78767076787 is an apocalyptic number.

78767076787 is a deficient number, since it is larger than the sum of its proper divisors (12859930961).

78767076787 is a wasteful number, since it uses less digits than its factorization.

78767076787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607491377 (or 1607491370 counting only the distinct ones).

The product of its (nonzero) digits is 271063296, while the sum is 70.

The spelling of 78767076787 in words is "seventy-eight billion, seven hundred sixty-seven million, seventy-six thousand, seven hundred eighty-seven".