78286132009 has 2 divisors, whose sum is σ = 78286132010. Its totient is φ = 78286132008.

The previous prime is 78286131983. The next prime is 78286132027. The reversal of 78286132009 is 90023168287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78247753984 + 38378025 = 279728^2 + 6195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78286132009 is a prime.

It is a super-2 number, since 2×78286132009² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78286132009.

It is not a weakly prime, because it can be changed into another prime (78286132409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39143066004 + 39143066005.

It is an arithmetic number, because the mean of its divisors is an integer number (39143066005).

Almost surely, 2^78286132009 is an apocalyptic number.

It is an amenable number.

78286132009 is a deficient number, since it is larger than the sum of its proper divisors (1).

78286132009 is an equidigital number, since it uses as much as digits as its factorization.

78286132009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 78286132009 in words is "seventy-eight billion, two hundred eighty-six million, one hundred thirty-two thousand, nine".