78076838367571 has 4 divisors (see below), whose sum is σ = 78179978181232. Its totient is φ = 77973698553912.

The previous prime is 78076838367569. The next prime is 78076838367589. The reversal of 78076838367571 is 17576383867087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78076838367571 - 2¹ = 78076838367569 is a prime.

It is a super-2 number, since 2×78076838367571² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78076838367271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51569905695 + ... + 51569907208.

It is an arithmetic number, because the mean of its divisors is an integer number (19544994545308).

Almost surely, 2^{78076838367571} is an apocalyptic number.

78076838367571 is a deficient number, since it is larger than the sum of its proper divisors (103139813661).

78076838367571 is a wasteful number, since it uses less digits than its factorization.

78076838367571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103139813660.

The product of its (nonzero) digits is 1991485440, while the sum is 76.

The spelling of 78076838367571 in words is "seventy-eight trillion, seventy-six billion, eight hundred thirty-eight million, three hundred sixty-seven thousand, five hundred seventy-one".