78113571 has 4 divisors (see below), whose sum is σ = 104151432. Its totient is φ = 52075712.

The previous prime is 78113537. The next prime is 78113587. The reversal of 78113571 is 17531187.

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 78113571 - 2¹⁰ = 78112547 is a prime.

It is a super-2 number, since 2×78113571² = 12203459948744082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78113591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13018926 + ... + 13018931.

It is an arithmetic number, because the mean of its divisors is an integer number (26037858).

Almost surely, 2^78113571 is an apocalyptic number.

78113571 is a deficient number, since it is larger than the sum of its proper divisors (26037861).

78113571 is a wasteful number, since it uses less digits than its factorization.

78113571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26037860.

The product of its digits is 5880, while the sum is 33.

The square root of 78113571 is about 8838.1882193128. The cubic root of 78113571 is about 427.4731394498.

The spelling of 78113571 in words is "seventy-eight million, one hundred thirteen thousand, five hundred seventy-one".