15953314397 has 2 divisors, whose sum is σ = 15953314398. Its totient is φ = 15953314396.

The previous prime is 15953314393. The next prime is 15953314427. The reversal of 15953314397 is 79341335951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14320669561 + 1632644836 = 119669^2 + 40406^2 .

It is an emirp because it is prime and its reverse (79341335951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15953314397 - 2² = 15953314393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15953314393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7976657198 + 7976657199.

It is an arithmetic number, because the mean of its divisors is an integer number (7976657199).

Almost surely, 2^15953314397 is an apocalyptic number.

It is an amenable number.

15953314397 is a deficient number, since it is larger than the sum of its proper divisors (1).

15953314397 is an equidigital number, since it uses as much as digits as its factorization.

15953314397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530900, while the sum is 50.

The spelling of 15953314397 in words is "fifteen billion, nine hundred fifty-three million, three hundred fourteen thousand, three hundred ninety-seven".