78400977299 has 2 divisors, whose sum is σ = 78400977300. Its totient is φ = 78400977298.

The previous prime is 78400977283. The next prime is 78400977301. The reversal of 78400977299 is 99277900487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78400977299 - 2⁴ = 78400977283 is a prime.

It is a super-2 number, since 2×78400977299² (a number of 23 digits) contains 22 as substring.

Together with 78400977301, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78400977899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39200488649 + 39200488650.

It is an arithmetic number, because the mean of its divisors is an integer number (39200488650).

Almost surely, 2^78400977299 is an apocalyptic number.

78400977299 is a deficient number, since it is larger than the sum of its proper divisors (1).

78400977299 is an equidigital number, since it uses as much as digits as its factorization.

78400977299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16003008, while the sum is 62.

The spelling of 78400977299 in words is "seventy-eight billion, four hundred million, nine hundred seventy-seven thousand, two hundred ninety-nine".