78082511 has 8 divisors (see below), whose sum is σ = 84419664. Its totient is φ = 71792640.

The previous prime is 78082507. The next prime is 78082561. The reversal of 78082511 is 11528087.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78082511 - 2² = 78082507 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 (78082561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8345 + ... + 15026.

It is an arithmetic number, because the mean of its divisors is an integer number (10552458).

Almost surely, 2^78082511 is an apocalyptic number.

78082511 is a deficient number, since it is larger than the sum of its proper divisors (6337153).

78082511 is a wasteful number, since it uses less digits than its factorization.

78082511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23641.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 78082511 is about 8836.4308971439. The cubic root of 78082511 is about 427.4164737696.

The spelling of 78082511 in words is "seventy-eight million, eighty-two thousand, five hundred eleven".