15620001697 has 2 divisors, whose sum is σ = 15620001698. Its totient is φ = 15620001696.

The previous prime is 15620001623. The next prime is 15620001757. The reversal of 15620001697 is 79610002651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12850716321 + 2769285376 = 113361^2 + 52624^2 .

It is an emirp because it is prime and its reverse (79610002651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15620001697 - 2¹¹ = 15619999649 is a prime.

It is not a weakly prime, because it can be changed into another prime (15620001097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7810000848 + 7810000849.

It is an arithmetic number, because the mean of its divisors is an integer number (7810000849).

Almost surely, 2^15620001697 is an apocalyptic number.

It is an amenable number.

15620001697 is a deficient number, since it is larger than the sum of its proper divisors (1).

15620001697 is an equidigital number, since it uses as much as digits as its factorization.

15620001697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 15620001697 in words is "fifteen billion, six hundred twenty million, one thousand, six hundred ninety-seven".