78472528510111 has 4 divisors (see below), whose sum is σ = 81884377575792. Its totient is φ = 75060679444432.

The previous prime is 78472528510097. The next prime is 78472528510169. The reversal of 78472528510111 is 11101582527487.

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 78472528510111 - 2⁷ = 78472528509983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78472528510171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1705924532806 + ... + 1705924532851.

It is an arithmetic number, because the mean of its divisors is an integer number (20471094393948).

Almost surely, 2^{78472528510111} is an apocalyptic number.

78472528510111 is a deficient number, since it is larger than the sum of its proper divisors (3411849065681).

78472528510111 is a wasteful number, since it uses less digits than its factorization.

78472528510111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3411849065680.

The product of its (nonzero) digits is 1254400, while the sum is 52.

The spelling of 78472528510111 in words is "seventy-eight trillion, four hundred seventy-two billion, five hundred twenty-eight million, five hundred ten thousand, one hundred eleven".