40221736697 has 2 divisors, whose sum is σ = 40221736698. Its totient is φ = 40221736696.

The previous prime is 40221736691. The next prime is 40221736757. The reversal of 40221736697 is 79663712204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40201854016 + 19882681 = 200504^2 + 4459^2 .

It is a cyclic number.

It is not a de Polignac number, because 40221736697 - 2²⁰ = 40220688121 is a prime.

It is not a weakly prime, because it can be changed into another prime (40221736691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110868348 + 20110868349.

It is an arithmetic number, because the mean of its divisors is an integer number (20110868349).

Almost surely, 2^40221736697 is an apocalyptic number.

It is an amenable number.

40221736697 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221736697 is an equidigital number, since it uses as much as digits as its factorization.

40221736697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 40221736697 in words is "forty billion, two hundred twenty-one million, seven hundred thirty-six thousand, six hundred ninety-seven".