78216065553308 has 6 divisors (see below), whose sum is σ = 136878114718296. Its totient is φ = 39108032776652.

The previous prime is 78216065553289. The next prime is 78216065553319. The reversal of 78216065553308 is 80335556061287.

It is a super-2 number, since 2×78216065553308² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9777008194160 + ... + 9777008194167.

It is an arithmetic number, because the mean of its divisors is an integer number (22813019119716).

Almost surely, 2^{78216065553308} is an apocalyptic number.

It is an amenable number.

78216065553308 is a deficient number, since it is larger than the sum of its proper divisors (58662049164988).

78216065553308 is a wasteful number, since it uses less digits than its factorization.

78216065553308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19554016388331 (or 19554016388329 counting only the distinct ones).

The product of its (nonzero) digits is 36288000, while the sum is 59.

The spelling of 78216065553308 in words is "seventy-eight trillion, two hundred sixteen billion, sixty-five million, five hundred fifty-three thousand, three hundred eight".