42397670591 has 4 divisors (see below), whose sum is σ = 44891651232. Its totient is φ = 39903689952.

The previous prime is 42397670573. The next prime is 42397670611. The reversal of 42397670591 is 19507679324.

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 42397670591 - 2⁶ = 42397670527 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 (42397670561) 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, 1246990295 + ... + 1246990328.

It is an arithmetic number, because the mean of its divisors is an integer number (11222912808).

Almost surely, 2^42397670591 is an apocalyptic number.

42397670591 is a deficient number, since it is larger than the sum of its proper divisors (2493980641).

42397670591 is a wasteful number, since it uses less digits than its factorization.

42397670591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493980640.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The spelling of 42397670591 in words is "forty-two billion, three hundred ninety-seven million, six hundred seventy thousand, five hundred ninety-one".