78810263431 has 2 divisors, whose sum is σ = 78810263432. Its totient is φ = 78810263430.

The previous prime is 78810263429. The next prime is 78810263461. The reversal of 78810263431 is 13436201887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78810263431 - 2¹ = 78810263429 is a prime.

It is a super-2 number, since 2×78810263431² (a number of 23 digits) contains 22 as substring.

Together with 78810263429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78810263461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39405131715 + 39405131716.

It is an arithmetic number, because the mean of its divisors is an integer number (39405131716).

Almost surely, 2^78810263431 is an apocalyptic number.

78810263431 is a deficient number, since it is larger than the sum of its proper divisors (1).

78810263431 is an equidigital number, since it uses as much as digits as its factorization.

78810263431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 78810263431 in words is "seventy-eight billion, eight hundred ten million, two hundred sixty-three thousand, four hundred thirty-one".