40187271577 has 2 divisors, whose sum is σ = 40187271578. Its totient is φ = 40187271576.

The previous prime is 40187271559. The next prime is 40187271581. The reversal of 40187271577 is 77517278104.

40187271577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40041610816 + 145660761 = 200104^2 + 12069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40187271577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40187271577.

It is not a weakly prime, because it can be changed into another prime (40187271517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20093635788 + 20093635789.

It is an arithmetic number, because the mean of its divisors is an integer number (20093635789).

Almost surely, 2^40187271577 is an apocalyptic number.

It is an amenable number.

40187271577 is a deficient number, since it is larger than the sum of its proper divisors (1).

40187271577 is an equidigital number, since it uses as much as digits as its factorization.

40187271577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768320, while the sum is 49.

The spelling of 40187271577 in words is "forty billion, one hundred eighty-seven million, two hundred seventy-one thousand, five hundred seventy-seven".