78216117241401 has 16 divisors (see below), whose sum is σ = 115875884275200. Its totient is φ = 52144008398064.

The previous prime is 78216117241397. The next prime is 78216117241403. The reversal of 78216117241401 is 10414271161287.

78216117241401 is a `hidden beast` number, since 7 + 8 + 2 + 1 + 61 + 172 + 414 + 0 + 1 = 666.

It is not a de Polignac number, because 78216117241401 - 2² = 78216117241397 is a prime.

It is a super-2 number, since 2×78216117241401² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78216117241403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25874515 + ... + 28738871.

It is an arithmetic number, because the mean of its divisors is an integer number (7242242767200).

Almost surely, 2^{78216117241401} is an apocalyptic number.

It is an amenable number.

78216117241401 is a deficient number, since it is larger than the sum of its proper divisors (37659767033799).

78216117241401 is a wasteful number, since it uses less digits than its factorization.

78216117241401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875725 (or 3875719 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The spelling of 78216117241401 in words is "seventy-eight trillion, two hundred sixteen billion, one hundred seventeen million, two hundred forty-one thousand, four hundred one".