78853694511 has 16 divisors (see below), whose sum is σ = 105800414720. Its totient is φ = 52238157120.

The previous prime is 78853694503. The next prime is 78853694519. The reversal of 78853694511 is 11549635887.

It is an interprime number because it is at equal distance from previous prime (78853694503) and next prime (78853694519).

It is not a de Polignac number, because 78853694511 - 2³ = 78853694503 is a prime.

It is a super-2 number, since 2×78853694511² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78853694519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4886346 + ... + 4902456.

It is an arithmetic number, because the mean of its divisors is an integer number (6612525920).

Almost surely, 2^78853694511 is an apocalyptic number.

78853694511 is a deficient number, since it is larger than the sum of its proper divisors (26946720209).

78853694511 is a wasteful number, since it uses less digits than its factorization.

78853694511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26286.

The product of its digits is 7257600, while the sum is 57.

The spelling of 78853694511 in words is "seventy-eight billion, eight hundred fifty-three million, six hundred ninety-four thousand, five hundred eleven".