78855098533 has 2 divisors, whose sum is σ = 78855098534. Its totient is φ = 78855098532.

The previous prime is 78855098521. The next prime is 78855098537. The reversal of 78855098533 is 33589055887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74715848964 + 4139249569 = 273342^2 + 64337^2 .

It is a cyclic number.

It is not a de Polignac number, because 78855098533 - 2²⁵ = 78821544101 is a prime.

It is the 280812-nd Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78855098537) by changing a digit.

It is a nontrivial repunit in base 280811.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39427549266 + 39427549267.

It is an arithmetic number, because the mean of its divisors is an integer number (39427549267).

Almost surely, 2^78855098533 is an apocalyptic number.

It is an amenable number.

78855098533 is a deficient number, since it is larger than the sum of its proper divisors (1).

78855098533 is an equidigital number, since it uses as much as digits as its factorization.

78855098533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288000, while the sum is 61.

The spelling of 78855098533 in words is "seventy-eight billion, eight hundred fifty-five million, ninety-eight thousand, five hundred thirty-three".