42255917821899 has 24 divisors (see below), whose sum is σ = 62335464439872. Its totient is φ = 27571018896000.

The previous prime is 42255917821891. The next prime is 42255917821961. The reversal of 42255917821899 is 99812871955224.

42255917821899 is a `hidden beast` number, since 4 + 2 + 2 + 5 + 591 + 7 + 8 + 21 + 8 + 9 + 9 = 666.

It is not a de Polignac number, because 42255917821899 - 2³ = 42255917821891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42255917821891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66438399 + ... + 67071399.

It is an arithmetic number, because the mean of its divisors is an integer number (2597311018328).

Almost surely, 2^{42255917821899} is an apocalyptic number.

42255917821899 is a deficient number, since it is larger than the sum of its proper divisors (20079546617973).

42255917821899 is a wasteful number, since it uses less digits than its factorization.

42255917821899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790867 (or 790864 counting only the distinct ones).

The product of its digits is 261273600, while the sum is 72.

The spelling of 42255917821899 in words is "forty-two trillion, two hundred fifty-five billion, nine hundred seventeen million, eight hundred twenty-one thousand, eight hundred ninety-nine".