78540288157213 has 2 divisors, whose sum is σ = 78540288157214. Its totient is φ = 78540288157212.

The previous prime is 78540288157211. The next prime is 78540288157291. The reversal of 78540288157213 is 31275188204587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54906514271449 + 23633773885764 = 7409893^2 + 4861458^2 .

It is a cyclic number.

It is not a de Polignac number, because 78540288157213 - 2¹ = 78540288157211 is a prime.

Together with 78540288157211, it forms a pair of twin primes.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39270144078606 + 39270144078607.

It is an arithmetic number, because the mean of its divisors is an integer number (39270144078607).

Almost surely, 2^{78540288157213} is an apocalyptic number.

It is an amenable number.

78540288157213 is a deficient number, since it is larger than the sum of its proper divisors (1).

78540288157213 is an equidigital number, since it uses as much as digits as its factorization.

78540288157213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30105600, while the sum is 61.

The spelling of 78540288157213 in words is "seventy-eight trillion, five hundred forty billion, two hundred eighty-eight million, one hundred fifty-seven thousand, two hundred thirteen".