78275011 has 4 divisors (see below), whose sum is σ = 79751952. Its totient is φ = 76798072.

The previous prime is 78274993. The next prime is 78275033. The reversal of 78275011 is 11057287.

It is a happy number.

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 78275011 - 2¹⁹ = 77750723 is a prime.

It is a super-2 number, since 2×78275011² = 12253954694100242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78275051) 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, 738391 + ... + 738496.

It is an arithmetic number, because the mean of its divisors is an integer number (19937988).

Almost surely, 2^78275011 is an apocalyptic number.

78275011 is a deficient number, since it is larger than the sum of its proper divisors (1476941).

78275011 is a wasteful number, since it uses less digits than its factorization.

78275011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476940.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 78275011 is about 8847.3165988338. The cubic root of 78275011 is about 427.7674279437.

The spelling of 78275011 in words is "seventy-eight million, two hundred seventy-five thousand, eleven".