78298254787 has 2 divisors, whose sum is σ = 78298254788. Its totient is φ = 78298254786.

The previous prime is 78298254709. The next prime is 78298254829. The reversal of 78298254787 is 78745289287.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78298254787 - 2¹⁵ = 78298222019 is a prime.

It is a super-2 number, since 2×78298254787² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78298254707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39149127393 + 39149127394.

It is an arithmetic number, because the mean of its divisors is an integer number (39149127394).

Almost surely, 2^78298254787 is an apocalyptic number.

78298254787 is a deficient number, since it is larger than the sum of its proper divisors (1).

78298254787 is an equidigital number, since it uses as much as digits as its factorization.

78298254787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126443520, while the sum is 67.

The spelling of 78298254787 in words is "seventy-eight billion, two hundred ninety-eight million, two hundred fifty-four thousand, seven hundred eighty-seven".