42065663633640 has 96 divisors (see below), whose sum is σ = 136720833935400. Its totient is φ = 11216900897280.

The previous prime is 42065663633639. The next prime is 42065663633683. The reversal of 42065663633640 is 4633636656024.

42065663633640 is a `hidden beast` number, since 4 + 2 + 0 + 6 + 566 + 3 + 6 + 3 + 36 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14652711228996 + 27412952404644 = 3827886^2 + 5235738^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3481206 + ... + 9810714.

Almost surely, 2^{42065663633640} is an apocalyptic number.

42065663633640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42065663633640 is an abundant number, since it is smaller than the sum of its proper divisors (94655170301760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42065663633640 is a wasteful number, since it uses less digits than its factorization.

42065663633640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6347987 (or 6347980 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 54.

The spelling of 42065663633640 in words is "forty-two trillion, sixty-five billion, six hundred sixty-three million, six hundred thirty-three thousand, six hundred forty".