42149414891 has 4 divisors (see below), whose sum is σ = 42156568392. Its totient is φ = 42142261392.

The previous prime is 42149414809. The next prime is 42149414897. The reversal of 42149414891 is 19841494124.

42149414891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42149414891 - 2¹⁴ = 42149398507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42149414897) 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, 3567905 + ... + 3579698.

It is an arithmetic number, because the mean of its divisors is an integer number (10539142098).

Almost surely, 2^42149414891 is an apocalyptic number.

42149414891 is a deficient number, since it is larger than the sum of its proper divisors (7153501).

42149414891 is an equidigital number, since it uses as much as digits as its factorization.

42149414891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7153500.

The product of its digits is 331776, while the sum is 47.

The spelling of 42149414891 in words is "forty-two billion, one hundred forty-nine million, four hundred fourteen thousand, eight hundred ninety-one".