15685147601 has 2 divisors, whose sum is σ = 15685147602. Its totient is φ = 15685147600.

The previous prime is 15685147579. The next prime is 15685147609. The reversal of 15685147601 is 10674158651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8357616400 + 7327531201 = 91420^2 + 85601^2 .

It is a cyclic number.

It is not a de Polignac number, because 15685147601 - 2²² = 15680953297 is a prime.

It is not a weakly prime, because it can be changed into another prime (15685147609) 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, 7842573800 + 7842573801.

It is an arithmetic number, because the mean of its divisors is an integer number (7842573801).

Almost surely, 2^15685147601 is an apocalyptic number.

It is an amenable number.

15685147601 is a deficient number, since it is larger than the sum of its proper divisors (1).

15685147601 is an equidigital number, since it uses as much as digits as its factorization.

15685147601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 44.

The spelling of 15685147601 in words is "fifteen billion, six hundred eighty-five million, one hundred forty-seven thousand, six hundred one".