78801018031 has 2 divisors, whose sum is σ = 78801018032. Its totient is φ = 78801018030.

The previous prime is 78801018011. The next prime is 78801018089. The reversal of 78801018031 is 13081010887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78801018031 - 2¹⁹ = 78800493743 is a prime.

It is a super-2 number, since 2×78801018031² (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 (78801018011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39400509015 + 39400509016.

It is an arithmetic number, because the mean of its divisors is an integer number (39400509016).

Almost surely, 2^78801018031 is an apocalyptic number.

78801018031 is a deficient number, since it is larger than the sum of its proper divisors (1).

78801018031 is an equidigital number, since it uses as much as digits as its factorization.

78801018031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 37.

The spelling of 78801018031 in words is "seventy-eight billion, eight hundred one million, eighteen thousand, thirty-one".