15780032137 has 2 divisors, whose sum is σ = 15780032138. Its totient is φ = 15780032136.

The previous prime is 15780032123. The next prime is 15780032141. The reversal of 15780032137 is 73123008751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8653464576 + 7126567561 = 93024^2 + 84419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15780032137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15780032096 and 15780032105.

It is not a weakly prime, because it can be changed into another prime (15780072137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7890016068 + 7890016069.

It is an arithmetic number, because the mean of its divisors is an integer number (7890016069).

Almost surely, 2^15780032137 is an apocalyptic number.

It is an amenable number.

15780032137 is a deficient number, since it is larger than the sum of its proper divisors (1).

15780032137 is an equidigital number, since it uses as much as digits as its factorization.

15780032137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 15780032137 in words is "fifteen billion, seven hundred eighty million, thirty-two thousand, one hundred thirty-seven".