40781888893 has 4 divisors (see below), whose sum is σ = 42097433728. Its totient is φ = 39466344060.

The previous prime is 40781888891. The next prime is 40781888911. The reversal of 40781888893 is 39888818704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40781888893 - 2¹ = 40781888891 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40781888891) 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 in 3 ways as a sum of consecutive naturals, for example, 657772371 + ... + 657772432.

It is an arithmetic number, because the mean of its divisors is an integer number (10524358432).

Almost surely, 2^40781888893 is an apocalyptic number.

It is an amenable number.

40781888893 is a deficient number, since it is larger than the sum of its proper divisors (1315544835).

40781888893 is a wasteful number, since it uses less digits than its factorization.

40781888893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315544834.

The product of its (nonzero) digits is 24772608, while the sum is 64.

The spelling of 40781888893 in words is "forty billion, seven hundred eighty-one million, eight hundred eighty-eight thousand, eight hundred ninety-three".