42810715391 has 4 divisors (see below), whose sum is σ = 43618464792. Its totient is φ = 42002965992.

The previous prime is 42810715351. The next prime is 42810715397. The reversal of 42810715391 is 19351701824.

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 42810715391 - 2¹⁸ = 42810453247 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 (42810715397) 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, 403874621 + ... + 403874726.

It is an arithmetic number, because the mean of its divisors is an integer number (10904616198).

Almost surely, 2^42810715391 is an apocalyptic number.

42810715391 is a deficient number, since it is larger than the sum of its proper divisors (807749401).

42810715391 is an equidigital number, since it uses as much as digits as its factorization.

42810715391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807749400.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 42810715391 in words is "forty-two billion, eight hundred ten million, seven hundred fifteen thousand, three hundred ninety-one".