78540288157211 has 2 divisors, whose sum is σ = 78540288157212. Its totient is φ = 78540288157210.

The previous prime is 78540288157151. The next prime is 78540288157213. The reversal of 78540288157211 is 11275188204587.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78540288157211 - 2²⁶ = 78540221048347 is a prime.

Together with 78540288157213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78540288157213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39270144078605 + 39270144078606.

It is an arithmetic number, because the mean of its divisors is an integer number (39270144078606).

Almost surely, 2^{78540288157211} is an apocalyptic number.

78540288157211 is a deficient number, since it is larger than the sum of its proper divisors (1).

78540288157211 is an equidigital number, since it uses as much as digits as its factorization.

78540288157211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10035200, while the sum is 59.

The spelling of 78540288157211 in words is "seventy-eight trillion, five hundred forty billion, two hundred eighty-eight million, one hundred fifty-seven thousand, two hundred eleven".