42734826981 has 24 divisors (see below), whose sum is σ = 76959689664. Its totient is φ = 22199909760.

The previous prime is 42734826947. The next prime is 42734827007. The reversal of 42734826981 is 18962843724.

42734826981 is a `hidden beast` number, since 4 + 2 + 73 + 482 + 6 + 98 + 1 = 666.

It is not a de Polignac number, because 42734826981 - 2¹⁰ = 42734825957 is a prime.

It is a super-2 number, since 2×42734826981² (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 (42734836981) 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, 30832516 + ... + 30833901.

It is an arithmetic number, because the mean of its divisors is an integer number (3206653736).

Almost surely, 2^42734826981 is an apocalyptic number.

It is an amenable number.

42734826981 is a deficient number, since it is larger than the sum of its proper divisors (34224862683).

42734826981 is a wasteful number, since it uses less digits than its factorization.

42734826981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61666441 (or 61666438 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 42734826981 in words is "forty-two billion, seven hundred thirty-four million, eight hundred twenty-six thousand, nine hundred eighty-one".