40012773981 has 16 divisors (see below), whose sum is σ = 53761580544. Its totient is φ = 26470027584.

The previous prime is 40012773967. The next prime is 40012774001. The reversal of 40012773981 is 18937721004.

It is not a de Polignac number, because 40012773981 - 2⁶ = 40012773917 is a prime.

It is a super-2 number, since 2×40012773981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40012773181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300436 + ... + 412658.

It is an arithmetic number, because the mean of its divisors is an integer number (3360098784).

Almost surely, 2^40012773981 is an apocalyptic number.

It is an amenable number.

40012773981 is a deficient number, since it is larger than the sum of its proper divisors (13748806563).

40012773981 is a wasteful number, since it uses less digits than its factorization.

40012773981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113140.

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 40012773981 in words is "forty billion, twelve million, seven hundred seventy-three thousand, nine hundred eighty-one".