78552011 has 4 divisors (see below), whose sum is σ = 78577800. Its totient is φ = 78526224.

The previous prime is 78551987. The next prime is 78552029. The reversal of 78552011 is 11025587.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78552011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78552041) 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, 7601 + ... + 14658.

It is an arithmetic number, because the mean of its divisors is an integer number (19644450).

Almost surely, 2^78552011 is an apocalyptic number.

78552011 is a deficient number, since it is larger than the sum of its proper divisors (25789).

78552011 is a wasteful number, since it uses less digits than its factorization.

78552011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25788.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 78552011 is about 8862.9572378524. The cubic root of 78552011 is about 428.2714290603.

Adding to 78552011 its reverse (11025587), we get a palindrome (89577598).

The spelling of 78552011 in words is "seventy-eight million, five hundred fifty-two thousand, eleven".