42008700191 has 4 divisors (see below), whose sum is σ = 43363819584. Its totient is φ = 40653580800.

The previous prime is 42008700179. The next prime is 42008700211. The reversal of 42008700191 is 19100780024.

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 42008700191 - 2⁶ = 42008700127 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 (42008700991) 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, 677559650 + ... + 677559711.

It is an arithmetic number, because the mean of its divisors is an integer number (10840954896).

Almost surely, 2^42008700191 is an apocalyptic number.

42008700191 is a deficient number, since it is larger than the sum of its proper divisors (1355119393).

42008700191 is a wasteful number, since it uses less digits than its factorization.

42008700191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355119392.

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 42008700191 in words is "forty-two billion, eight million, seven hundred thousand, one hundred ninety-one".