78281746894231 has 2 divisors, whose sum is σ = 78281746894232. Its totient is φ = 78281746894230.

The previous prime is 78281746894217. The next prime is 78281746894259. The reversal of 78281746894231 is 13249864718287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78281746894231 - 2⁵ = 78281746894199 is a prime.

It is a super-2 number, since 2×78281746894231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78281746834231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39140873447115 + 39140873447116.

It is an arithmetic number, because the mean of its divisors is an integer number (39140873447116).

Almost surely, 2^{78281746894231} is an apocalyptic number.

78281746894231 is a deficient number, since it is larger than the sum of its proper divisors (1).

78281746894231 is an equidigital number, since it uses as much as digits as its factorization.

78281746894231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 260112384, while the sum is 70.

The spelling of 78281746894231 in words is "seventy-eight trillion, two hundred eighty-one billion, seven hundred forty-six million, eight hundred ninety-four thousand, two hundred thirty-one".