78111141 has 8 divisors (see below), whose sum is σ = 110274624. Its totient is φ = 49010880.

The previous prime is 78111139. The next prime is 78111149. The reversal of 78111141 is 14111187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78111141 - 2¹ = 78111139 is a prime.

It is a super-2 number, since 2×78111141² = 12202700696643762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78111149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765745 + ... + 765846.

It is an arithmetic number, because the mean of its divisors is an integer number (13784328).

Almost surely, 2^78111141 is an apocalyptic number.

It is an amenable number.

78111141 is a deficient number, since it is larger than the sum of its proper divisors (32163483).

78111141 is a wasteful number, since it uses less digits than its factorization.

78111141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531611.

The product of its digits is 224, while the sum is 24.

The square root of 78111141 is about 8838.0507466296. The cubic root of 78111141 is about 427.4687067138.

The spelling of 78111141 in words is "seventy-eight million, one hundred eleven thousand, one hundred forty-one".