78465515317211 has 32 divisors (see below), whose sum is σ = 86683943259648. Its totient is φ = 70434344055040.

The previous prime is 78465515317181. The next prime is 78465515317237. The reversal of 78465515317211 is 11271351556487.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78465515317211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78465515317271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369496415 + ... + 369708711.

It is an arithmetic number, because the mean of its divisors is an integer number (2708873226864).

Almost surely, 2^{78465515317211} is an apocalyptic number.

78465515317211 is a deficient number, since it is larger than the sum of its proper divisors (8218427942437).

78465515317211 is a wasteful number, since it uses less digits than its factorization.

78465515317211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213811.

The product of its digits is 7056000, while the sum is 56.

The spelling of 78465515317211 in words is "seventy-eight trillion, four hundred sixty-five billion, five hundred fifteen million, three hundred seventeen thousand, two hundred eleven".