40740925981 has 12 divisors (see below), whose sum is σ = 47400606972. Its totient is φ = 34914824448.

The previous prime is 40740925963. The next prime is 40740925991. The reversal of 40740925981 is 18952904704.

40740925981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16942927225 + 23797998756 = 130165^2 + 154266^2 .

It is not a de Polignac number, because 40740925981 - 2¹⁹ = 40740401693 is a prime.

It is a super-2 number, since 2×40740925981² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40740925991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 231531 + ... + 367543.

It is an arithmetic number, because the mean of its divisors is an integer number (3950050581).

Almost surely, 2^40740925981 is an apocalyptic number.

It is an amenable number.

40740925981 is a deficient number, since it is larger than the sum of its proper divisors (6659680991).

40740925981 is a wasteful number, since it uses less digits than its factorization.

40740925981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142140 (or 142133 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 40740925981 in words is "forty billion, seven hundred forty million, nine hundred twenty-five thousand, nine hundred eighty-one".