78971504212297 has 4 divisors (see below), whose sum is σ = 78971524529940. Its totient is φ = 78971483894656.

The previous prime is 78971504212261. The next prime is 78971504212339. The reversal of 78971504212297 is 79221240517987.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32750256710656 + 46221247501641 = 5722784^2 + 6798621^2 .

It is a cyclic number.

It is not a de Polignac number, because 78971504212297 - 2¹⁹ = 78971503688009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78971504212207) 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, 2304208 + ... + 12777025.

It is an arithmetic number, because the mean of its divisors is an integer number (19742881132485).

Almost surely, 2^{78971504212297} is an apocalyptic number.

It is an amenable number.

78971504212297 is a deficient number, since it is larger than the sum of its proper divisors (20317643).

78971504212297 is a wasteful number, since it uses less digits than its factorization.

78971504212297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20317642.

The product of its (nonzero) digits is 35562240, while the sum is 64.

The spelling of 78971504212297 in words is "seventy-eight trillion, nine hundred seventy-one billion, five hundred four million, two hundred twelve thousand, two hundred ninety-seven".