78371371111 has 4 divisors (see below), whose sum is σ = 85496041224. Its totient is φ = 71246701000.

The previous prime is 78371371097. The next prime is 78371371123. The reversal of 78371371111 is 11117317387.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78371371111 - 2⁵ = 78371371079 is a prime.

It is a super-2 number, since 2×78371371111² (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 (78371321111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3562335040 + ... + 3562335061.

It is an arithmetic number, because the mean of its divisors is an integer number (21374010306).

Almost surely, 2^78371371111 is an apocalyptic number.

78371371111 is a deficient number, since it is larger than the sum of its proper divisors (7124670113).

78371371111 is a wasteful number, since it uses less digits than its factorization.

78371371111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7124670112.

The product of its digits is 24696, while the sum is 40.

Adding to 78371371111 its reverse (11117317387), we get a palindrome (89488688498).

The spelling of 78371371111 in words is "seventy-eight billion, three hundred seventy-one million, three hundred seventy-one thousand, one hundred eleven".