78090537965939 has 2 divisors, whose sum is σ = 78090537965940. Its totient is φ = 78090537965938.

The previous prime is 78090537965929. The next prime is 78090537965963. The reversal of 78090537965939 is 93956973509087.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78090537965939 is a prime.

It is not a weakly prime, because it can be changed into another prime (78090537965929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39045268982969 + 39045268982970.

It is an arithmetic number, because the mean of its divisors is an integer number (39045268982970).

Almost surely, 2^{78090537965939} is an apocalyptic number.

78090537965939 is a deficient number, since it is larger than the sum of its proper divisors (1).

78090537965939 is an equidigital number, since it uses as much as digits as its factorization.

78090537965939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3472081200, while the sum is 80.

The spelling of 78090537965939 in words is "seventy-eight trillion, ninety billion, five hundred thirty-seven million, nine hundred sixty-five thousand, nine hundred thirty-nine".