401116849542981 has 160 divisors (see below), whose sum is σ = 705394859385216. Its totient is φ = 223942081536000.

The previous prime is 401116849542919. The next prime is 401116849542991. The reversal of 401116849542981 is 189245948611104.

401116849542981 is a `hidden beast` number, since 4 + 0 + 1 + 1 + 1 + 6 + 8 + 4 + 9 + 542 + 9 + 81 = 666.

It is not a de Polignac number, because 401116849542981 - 2⁶ = 401116849542917 is a prime.

It is a super-2 number, since 2×401116849542981² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401116849542991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 30165959325 + ... + 30165972621.

Almost surely, 2^{401116849542981} is an apocalyptic number.

It is an amenable number.

401116849542981 is a deficient number, since it is larger than the sum of its proper divisors (304278009842235).

401116849542981 is a wasteful number, since it uses less digits than its factorization.

401116849542981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18465 (or 18456 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 63.

The spelling of 401116849542981 in words is "four hundred one trillion, one hundred sixteen billion, eight hundred forty-nine million, five hundred forty-two thousand, nine hundred eighty-one".