78143967511 has 2 divisors, whose sum is σ = 78143967512. Its totient is φ = 78143967510.

The previous prime is 78143967509. The next prime is 78143967571. The reversal of 78143967511 is 11576934187.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78143967511 - 2¹ = 78143967509 is a prime.

It is a super-2 number, since 2×78143967511² (a number of 23 digits) contains 22 as substring.

Together with 78143967509, 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 (78143967571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39071983755 + 39071983756.

It is an arithmetic number, because the mean of its divisors is an integer number (39071983756).

Almost surely, 2^78143967511 is an apocalyptic number.

78143967511 is a deficient number, since it is larger than the sum of its proper divisors (1).

78143967511 is an equidigital number, since it uses as much as digits as its factorization.

78143967511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 52.

The spelling of 78143967511 in words is "seventy-eight billion, one hundred forty-three million, nine hundred sixty-seven thousand, five hundred eleven".