40681612801 has 4 divisors (see below), whose sum is σ = 40750216452. Its totient is φ = 40613009152.

The previous prime is 40681612793. The next prime is 40681612831. The reversal of 40681612801 is 10821618604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32607691776 + 8073921025 = 180576^2 + 89855^2 .

It is a cyclic number.

It is not a de Polignac number, because 40681612801 - 2³ = 40681612793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40681612831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34300936 + ... + 34302121.

It is an arithmetic number, because the mean of its divisors is an integer number (10187554113).

Almost surely, 2^40681612801 is an apocalyptic number.

It is an amenable number.

40681612801 is a deficient number, since it is larger than the sum of its proper divisors (68603651).

40681612801 is an equidigital number, since it uses as much as digits as its factorization.

40681612801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68603650.

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 40681612801 in words is "forty billion, six hundred eighty-one million, six hundred twelve thousand, eight hundred one".