42816890391 has 64 divisors (see below), whose sum is σ = 64426475520. Its totient is φ = 25069968000.

The previous prime is 42816890383. The next prime is 42816890407. The reversal of 42816890391 is 19309861824.

It is not a de Polignac number, because 42816890391 - 2³ = 42816890383 is a prime.

It is a super-2 number, since 2×42816890391² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42116890391) 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 63 ways as a sum of consecutive naturals, for example, 64775601 + ... + 64776261.

It is an arithmetic number, because the mean of its divisors is an integer number (1006663680).

Almost surely, 2^42816890391 is an apocalyptic number.

42816890391 is a deficient number, since it is larger than the sum of its proper divisors (21609585129).

42816890391 is a wasteful number, since it uses less digits than its factorization.

42816890391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148.

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 42816890391 in words is "forty-two billion, eight hundred sixteen million, eight hundred ninety thousand, three hundred ninety-one".