78535333091 has 2 divisors, whose sum is σ = 78535333092. Its totient is φ = 78535333090.

The previous prime is 78535333027. The next prime is 78535333141. The reversal of 78535333091 is 19033353587.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78535333091 - 2⁶ = 78535333027 is a prime.

It is a super-2 number, since 2×78535333091² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78535333391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39267666545 + 39267666546.

It is an arithmetic number, because the mean of its divisors is an integer number (39267666546).

Almost surely, 2^78535333091 is an apocalyptic number.

78535333091 is a deficient number, since it is larger than the sum of its proper divisors (1).

78535333091 is an equidigital number, since it uses as much as digits as its factorization.

78535333091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1020600, while the sum is 47.

The spelling of 78535333091 in words is "seventy-eight billion, five hundred thirty-five million, three hundred thirty-three thousand, ninety-one".