78580320491 has 8 divisors (see below), whose sum is σ = 78867987120. Its totient is φ = 78292724832.

The previous prime is 78580320473. The next prime is 78580320557. The reversal of 78580320491 is 19402308587.

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 78580320491 - 2²⁶ = 78513211627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78580320431) 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, 3365405 + ... + 3388673.

It is an arithmetic number, because the mean of its divisors is an integer number (9858498390).

Almost surely, 2^78580320491 is an apocalyptic number.

78580320491 is a deficient number, since it is larger than the sum of its proper divisors (287666629).

78580320491 is a wasteful number, since it uses less digits than its factorization.

78580320491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35485.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 78580320491 in words is "seventy-eight billion, five hundred eighty million, three hundred twenty thousand, four hundred ninety-one".