981427461775 has 6 divisors (see below), whose sum is σ = 1216970052632. Its totient is φ = 785141969400.

The previous prime is 981427461767. The next prime is 981427461809. The reversal of 981427461775 is 577164724189.

It is a happy number.

It is not a de Polignac number, because 981427461775 - 2³ = 981427461767 is a prime.

It is a super-2 number, since 2×981427461775² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 19628549211 + ... + 19628549260.

Almost surely, 2^981427461775 is an apocalyptic number.

981427461775 is a deficient number, since it is larger than the sum of its proper divisors (235542590857).

981427461775 is a wasteful number, since it uses less digits than its factorization.

981427461775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39257098481 (or 39257098476 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 61.

The spelling of 981427461775 in words is "nine hundred eighty-one billion, four hundred twenty-seven million, four hundred sixty-one thousand, seven hundred seventy-five".