38985640697 has 2 divisors, whose sum is σ = 38985640698. Its totient is φ = 38985640696.

The previous prime is 38985640693. The next prime is 38985640739. The reversal of 38985640697 is 79604658983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28876544761 + 10109095936 = 169931^2 + 100544^2 .

It is a cyclic number.

It is not a de Polignac number, because 38985640697 - 2² = 38985640693 is a prime.

It is not a weakly prime, because it can be changed into another prime (38985640693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19492820348 + 19492820349.

It is an arithmetic number, because the mean of its divisors is an integer number (19492820349).

Almost surely, 2^38985640697 is an apocalyptic number.

It is an amenable number.

38985640697 is a deficient number, since it is larger than the sum of its proper divisors (1).

38985640697 is an equidigital number, since it uses as much as digits as its factorization.

38985640697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78382080, while the sum is 65.

The spelling of 38985640697 in words is "thirty-eight billion, nine hundred eighty-five million, six hundred forty thousand, six hundred ninety-seven".