78298128431 has 2 divisors, whose sum is σ = 78298128432. Its totient is φ = 78298128430.

The previous prime is 78298128361. The next prime is 78298128463. The reversal of 78298128431 is 13482189287.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78298128431 - 2¹⁴ = 78298112047 is a prime.

It is a super-2 number, since 2×78298128431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78298128731) 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 as a sum of consecutive naturals, namely, 39149064215 + 39149064216.

It is an arithmetic number, because the mean of its divisors is an integer number (39149064216).

Almost surely, 2^78298128431 is an apocalyptic number.

78298128431 is a deficient number, since it is larger than the sum of its proper divisors (1).

78298128431 is an equidigital number, since it uses as much as digits as its factorization.

78298128431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 53.

The spelling of 78298128431 in words is "seventy-eight billion, two hundred ninety-eight million, one hundred twenty-eight thousand, four hundred thirty-one".