41987911681 has 16 divisors (see below), whose sum is σ = 43828266240. Its totient is φ = 40194564480.

The previous prime is 41987911663. The next prime is 41987911699. The reversal of 41987911681 is 18611978914.

It is an interprime number because it is at equal distance from previous prime (41987911663) and next prime (41987911699).

It is a cyclic number.

It is not a de Polignac number, because 41987911681 - 2⁵ = 41987911649 is a prime.

It is a super-2 number, since 2×41987911681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41987911631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472285 + ... + 554101.

It is an arithmetic number, because the mean of its divisors is an integer number (2739266640).

Almost surely, 2^41987911681 is an apocalyptic number.

It is an amenable number.

41987911681 is a deficient number, since it is larger than the sum of its proper divisors (1840354559).

41987911681 is a wasteful number, since it uses less digits than its factorization.

41987911681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82104.

The product of its digits is 870912, while the sum is 55.

The spelling of 41987911681 in words is "forty-one billion, nine hundred eighty-seven million, nine hundred eleven thousand, six hundred eighty-one".