15697361971 has 2 divisors, whose sum is σ = 15697361972. Its totient is φ = 15697361970.

The previous prime is 15697361963. The next prime is 15697362001. The reversal of 15697361971 is 17916379651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15697361971 - 2³ = 15697361963 is a prime.

It is not a weakly prime, because it can be changed into another prime (15697361921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7848680985 + 7848680986.

It is an arithmetic number, because the mean of its divisors is an integer number (7848680986).

Almost surely, 2^15697361971 is an apocalyptic number.

15697361971 is a deficient number, since it is larger than the sum of its proper divisors (1).

15697361971 is an equidigital number, since it uses as much as digits as its factorization.

15697361971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2143260, while the sum is 55.

The spelling of 15697361971 in words is "fifteen billion, six hundred ninety-seven million, three hundred sixty-one thousand, nine hundred seventy-one".