40795872581 has 2 divisors, whose sum is σ = 40795872582. Its totient is φ = 40795872580.

The previous prime is 40795872499. The next prime is 40795872697. The reversal of 40795872581 is 18527859704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24240933025 + 16554939556 = 155695^2 + 128666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40795872581 is a prime.

It is a super-2 number, since 2×40795872581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40795862581) 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 as a sum of consecutive naturals, namely, 20397936290 + 20397936291.

It is an arithmetic number, because the mean of its divisors is an integer number (20397936291).

Almost surely, 2^40795872581 is an apocalyptic number.

It is an amenable number.

40795872581 is a deficient number, since it is larger than the sum of its proper divisors (1).

40795872581 is an equidigital number, since it uses as much as digits as its factorization.

40795872581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5644800, while the sum is 56.

The spelling of 40795872581 in words is "forty billion, seven hundred ninety-five million, eight hundred seventy-two thousand, five hundred eighty-one".