73780970491 has 4 divisors (see below), whose sum is σ = 73781921272. Its totient is φ = 73780019712.

The previous prime is 73780970477. The next prime is 73780970519. The reversal of 73780970491 is 19407908737.

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 73780970491 - 2²¹ = 73778873339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73780970891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347526 + ... + 518011.

It is an arithmetic number, because the mean of its divisors is an integer number (18445480318).

Almost surely, 2^73780970491 is an apocalyptic number.

73780970491 is a deficient number, since it is larger than the sum of its proper divisors (950781).

73780970491 is an equidigital number, since it uses as much as digits as its factorization.

73780970491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950780.

The product of its (nonzero) digits is 2667168, while the sum is 55.

The spelling of 73780970491 in words is "seventy-three billion, seven hundred eighty million, nine hundred seventy thousand, four hundred ninety-one".