426681916281 has 12 divisors (see below), whose sum is σ = 616324999680. Its totient is φ = 284451529560.

The previous prime is 426681916277. The next prime is 426681916291. The reversal of 426681916281 is 182619186624.

426681916281 is a `hidden beast` number, since 4 + 2 + 6 + 6 + 8 + 1 + 9 + 1 + 628 + 1 = 666.

It is not a de Polignac number, because 426681916281 - 2² = 426681916277 is a prime.

It is a super-2 number, since 2×426681916281² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (426681916201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 889600 + ... + 1282478.

It is an arithmetic number, because the mean of its divisors is an integer number (51360416640).

Almost surely, 2^426681916281 is an apocalyptic number.

It is an amenable number.

426681916281 is a deficient number, since it is larger than the sum of its proper divisors (189643083399).

426681916281 is a wasteful number, since it uses less digits than its factorization.

426681916281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513556 (or 513553 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The spelling of 426681916281 in words is "four hundred twenty-six billion, six hundred eighty-one million, nine hundred sixteen thousand, two hundred eighty-one".