15780032069 has 2 divisors, whose sum is σ = 15780032070. Its totient is φ = 15780032068.

The previous prime is 15780032053. The next prime is 15780032123. The reversal of 15780032069 is 96023008751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12529891969 + 3250140100 = 111937^2 + 57010^2 .

It is a cyclic number.

It is not a de Polignac number, because 15780032069 - 2⁴ = 15780032053 is a prime.

It is a super-2 number, since 2×15780032069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15780032369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7890016034 + 7890016035.

It is an arithmetic number, because the mean of its divisors is an integer number (7890016035).

Almost surely, 2^15780032069 is an apocalyptic number.

It is an amenable number.

15780032069 is a deficient number, since it is larger than the sum of its proper divisors (1).

15780032069 is an equidigital number, since it uses as much as digits as its factorization.

15780032069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 15780032069 in words is "fifteen billion, seven hundred eighty million, thirty-two thousand, sixty-nine".