78298576877 has 2 divisors, whose sum is σ = 78298576878. Its totient is φ = 78298576876.

The previous prime is 78298576841. The next prime is 78298576879. The reversal of 78298576877 is 77867589287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50471666281 + 27826910596 = 224659^2 + 166814^2 .

It is a cyclic number.

It is not a de Polignac number, because 78298576877 - 2¹⁶ = 78298511341 is a prime.

It is a super-2 number, since 2×78298576877² (a number of 23 digits) contains 22 as substring.

Together with 78298576879, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78298576879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39149288438 + 39149288439.

It is an arithmetic number, because the mean of its divisors is an integer number (39149288439).

Almost surely, 2^78298576877 is an apocalyptic number.

It is an amenable number.

78298576877 is a deficient number, since it is larger than the sum of its proper divisors (1).

78298576877 is an equidigital number, since it uses as much as digits as its factorization.

78298576877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663828480, while the sum is 74.

The spelling of 78298576877 in words is "seventy-eight billion, two hundred ninety-eight million, five hundred seventy-six thousand, eight hundred seventy-seven".