78064591 has 8 divisors (see below), whose sum is σ = 85227264. Its totient is φ = 70912920.

The previous prime is 78064579. The next prime is 78064621. The reversal of 78064591 is 19546087.

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 78064591 - 2⁷ = 78064463 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 (78064291) 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, 21210 + ... + 24616.

It is an arithmetic number, because the mean of its divisors is an integer number (10653408).

Almost surely, 2^78064591 is an apocalyptic number.

78064591 is a deficient number, since it is larger than the sum of its proper divisors (7162673).

78064591 is a wasteful number, since it uses less digits than its factorization.

78064591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5501.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 78064591 is about 8835.4168549084. The cubic root of 78064591 is about 427.3837737914.

The spelling of 78064591 in words is "seventy-eight million, sixty-four thousand, five hundred ninety-one".