35642041681 has 3 divisors (see below), whose sum is σ = 35642230473. Its totient is φ = 35641852890.

The previous prime is 35642041667. The next prime is 35642041703. The reversal of 35642041681 is 18614024653.

It is a happy number.

The square root of 35642041681 is 188791.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 35642041681 - 2¹³ = 35642033489 is a prime.

It is a super-2 number, since 2×35642041681² (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 (35642041381) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 94396 + ... + 283186.

It is an arithmetic number, because the mean of its divisors is an integer number (11880743491).

Almost surely, 2^35642041681 is an apocalyptic number.

35642041681 is the 188791-st square number.

35642041681 is the 94396-th centered octagonal number.

It is an amenable number.

35642041681 is a deficient number, since it is larger than the sum of its proper divisors (188792).

35642041681 is an frugal number, since it uses more digits than its factorization.

35642041681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377582 (or 188791 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 35642041681 in words is "thirty-five billion, six hundred forty-two million, forty-one thousand, six hundred eighty-one".