78841550511 has 12 divisors (see below), whose sum is σ = 115009787880. Its totient is φ = 52040626800.

The previous prime is 78841550429. The next prime is 78841550519. The reversal of 78841550511 is 11505514887.

78841550511 is a `hidden beast` number, since 7 + 8 + 8 + 41 + 550 + 51 + 1 = 666.

It is not a de Polignac number, because 78841550511 - 2⁷ = 78841550383 is a prime.

It is a super-2 number, since 2×78841550511² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78841550519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43366281 + ... + 43368098.

It is an arithmetic number, because the mean of its divisors is an integer number (9584148990).

Almost surely, 2^78841550511 is an apocalyptic number.

78841550511 is a deficient number, since it is larger than the sum of its proper divisors (36168237369).

78841550511 is a wasteful number, since it uses less digits than its factorization.

78841550511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86734486 (or 86734483 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 45.

The spelling of 78841550511 in words is "seventy-eight billion, eight hundred forty-one million, five hundred fifty thousand, five hundred eleven".