78216136013455 has 16 divisors (see below), whose sum is σ = 105922792346400. Its totient is φ = 54922929362560.

The previous prime is 78216136013387. The next prime is 78216136013459. The reversal of 78216136013455 is 55431063161287.

It is not a de Polignac number, because 78216136013455 - 2¹³ = 78216136005263 is a prime.

It is a super-2 number, since 2×78216136013455² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78216136013459) 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, 24519163300 + ... + 24519166489.

It is an arithmetic number, because the mean of its divisors is an integer number (6620174521650).

Almost surely, 2^{78216136013455} is an apocalyptic number.

78216136013455 is a deficient number, since it is larger than the sum of its proper divisors (27706656332945).

78216136013455 is a wasteful number, since it uses less digits than its factorization.

78216136013455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49038329834.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 78216136013455 in words is "seventy-eight trillion, two hundred sixteen billion, one hundred thirty-six million, thirteen thousand, four hundred fifty-five".