40072770641 has 2 divisors, whose sum is σ = 40072770642. Its totient is φ = 40072770640.

The previous prime is 40072770611. The next prime is 40072770643. The reversal of 40072770641 is 14607727004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24870867025 + 15201903616 = 157705^2 + 123296^2 .

It is a cyclic number.

It is not a de Polignac number, because 40072770641 - 2³⁴ = 22892901457 is a prime.

Together with 40072770643, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40072770595 and 40072770604.

It is not a weakly prime, because it can be changed into another prime (40072770643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20036385320 + 20036385321.

It is an arithmetic number, because the mean of its divisors is an integer number (20036385321).

Almost surely, 2^40072770641 is an apocalyptic number.

It is an amenable number.

40072770641 is a deficient number, since it is larger than the sum of its proper divisors (1).

40072770641 is an equidigital number, since it uses as much as digits as its factorization.

40072770641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 38.

The spelling of 40072770641 in words is "forty billion, seventy-two million, seven hundred seventy thousand, six hundred forty-one".