40407981059777 has 4 divisors (see below), whose sum is σ = 40407997301700. Its totient is φ = 40407964817856.

The previous prime is 40407981059713. The next prime is 40407981059819. The reversal of 40407981059777 is 77795018970404.

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 24716249743936 + 15691731315841 = 4971544^2 + 3961279^2 .

It is a cyclic number.

It is not a de Polignac number, because 40407981059777 - 2⁶ = 40407981059713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40407981053777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3520388 + ... + 9654485.

It is an arithmetic number, because the mean of its divisors is an integer number (10101999325425).

Almost surely, 2^{40407981059777} is an apocalyptic number.

It is an amenable number.

40407981059777 is a deficient number, since it is larger than the sum of its proper divisors (16241923).

40407981059777 is a wasteful number, since it uses less digits than its factorization.

40407981059777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16241922.

The product of its (nonzero) digits is 124467840, while the sum is 68.

The spelling of 40407981059777 in words is "forty trillion, four hundred seven billion, nine hundred eighty-one million, fifty-nine thousand, seven hundred seventy-seven".