42839476885971 has 20 divisors (see below), whose sum is σ = 63995328683352. Its totient is φ = 28559403763488.

The previous prime is 42839476885939. The next prime is 42839476885987. The reversal of 42839476885971 is 17958867493824.

42839476885971 is a `hidden beast` number, since 4 + 2 + 8 + 394 + 7 + 68 + 85 + 97 + 1 = 666.

It is not a de Polignac number, because 42839476885971 - 2⁵ = 42839476885939 is a prime.

It is a super-2 number, since 2×42839476885971² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (42839476885901) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7362636 + ... + 11827398.

Almost surely, 2^{42839476885971} is an apocalyptic number.

42839476885971 is a deficient number, since it is larger than the sum of its proper divisors (21155851797381).

42839476885971 is a wasteful number, since it uses less digits than its factorization.

42839476885971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583232 (or 4583223 counting only the distinct ones).

The product of its digits is 5852528640, while the sum is 81.

The spelling of 42839476885971 in words is "forty-two trillion, eight hundred thirty-nine billion, four hundred seventy-six million, eight hundred eighty-five thousand, nine hundred seventy-one".