78321514415 has 12 divisors (see below), whose sum is σ = 97115423832. Its totient is φ = 60636007440.

The previous prime is 78321514343. The next prime is 78321514457. The reversal of 78321514415 is 51441512387.

It is a de Polignac number, because none of the positive numbers 2^k-78321514415 is a prime.

It is a super-3 number, since 3×78321514415³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8145197 + ... + 8154806.

It is an arithmetic number, because the mean of its divisors is an integer number (8092951986).

Almost surely, 2^78321514415 is an apocalyptic number.

78321514415 is a deficient number, since it is larger than the sum of its proper divisors (18793909417).

78321514415 is a wasteful number, since it uses less digits than its factorization.

78321514415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16300070 (or 16300039 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The spelling of 78321514415 in words is "seventy-eight billion, three hundred twenty-one million, five hundred fourteen thousand, four hundred fifteen".