78180841 has 16 divisors (see below), whose sum is σ = 87868800. Its totient is φ = 69169408.

The previous prime is 78180803. The next prime is 78180857. The reversal of 78180841 is 14808187.

It is a cyclic number.

It is not a de Polignac number, because 78180841 - 2¹⁵ = 78148073 is a prime.

It is a super-2 number, since 2×78180841² = 12224487798934562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78180841.

It is not an unprimeable number, because it can be changed into a prime (78180871) 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, 21375 + ... + 24763.

It is an arithmetic number, because the mean of its divisors is an integer number (5491800).

Almost surely, 2^78180841 is an apocalyptic number.

It is an amenable number.

78180841 is a deficient number, since it is larger than the sum of its proper divisors (9687959).

78180841 is a wasteful number, since it uses less digits than its factorization.

78180841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3488.

The product of its (nonzero) digits is 14336, while the sum is 37.

The square root of 78180841 is about 8841.9930445573. The cubic root of 78180841 is about 427.5958149632.

The spelling of 78180841 in words is "seventy-eight million, one hundred eighty thousand, eight hundred forty-one".