78540288157291 has 2 divisors, whose sum is σ = 78540288157292. Its totient is φ = 78540288157290.

The previous prime is 78540288157213. The next prime is 78540288157337. The reversal of 78540288157291 is 19275188204587.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78540288157291 - 2²⁷ = 78540153939563 is a prime.

It is not a weakly prime, because it can be changed into another prime (78540288157211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39270144078645 + 39270144078646.

It is an arithmetic number, because the mean of its divisors is an integer number (39270144078646).

Almost surely, 2^{78540288157291} is an apocalyptic number.

78540288157291 is a deficient number, since it is larger than the sum of its proper divisors (1).

78540288157291 is an equidigital number, since it uses as much as digits as its factorization.

78540288157291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90316800, while the sum is 67.

The spelling of 78540288157291 in words is "seventy-eight trillion, five hundred forty billion, two hundred eighty-eight million, one hundred fifty-seven thousand, two hundred ninety-one".