78790572871 has 2 divisors, whose sum is σ = 78790572872. Its totient is φ = 78790572870.

The previous prime is 78790572869. The next prime is 78790572989. The reversal of 78790572871 is 17827509787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78790572871 - 2¹ = 78790572869 is a prime.

It is a super-2 number, since 2×78790572871² (a number of 23 digits) contains 22 as substring.

Together with 78790572869, 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 (78790572821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39395286435 + 39395286436.

It is an arithmetic number, because the mean of its divisors is an integer number (39395286436).

Almost surely, 2^78790572871 is an apocalyptic number.

78790572871 is a deficient number, since it is larger than the sum of its proper divisors (1).

78790572871 is an equidigital number, since it uses as much as digits as its factorization.

78790572871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13829760, while the sum is 61.

The spelling of 78790572871 in words is "seventy-eight billion, seven hundred ninety million, five hundred seventy-two thousand, eight hundred seventy-one".