78260011 has 4 divisors (see below), whose sum is σ = 79543024. Its totient is φ = 76977000.

The previous prime is 78259997. The next prime is 78260047. The reversal of 78260011 is 11006287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11006287 = 263 ⋅41849.

It is a cyclic number.

It is not a de Polignac number, because 78260011 - 2²¹ = 76162859 is a prime.

It is a super-2 number, since 2×78260011² = 12249258643440242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78260051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641415 + ... + 641536.

It is an arithmetic number, because the mean of its divisors is an integer number (19885756).

Almost surely, 2^78260011 is an apocalyptic number.

78260011 is a deficient number, since it is larger than the sum of its proper divisors (1283013).

78260011 is a wasteful number, since it uses less digits than its factorization.

78260011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283012.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 78260011 is about 8846.4688435556. The cubic root of 78260011 is about 427.7401015499.

Adding to 78260011 its reverse (11006287), we get a palindrome (89266298).

The spelling of 78260011 in words is "seventy-eight million, two hundred sixty thousand, eleven".