78724410171 has 32 divisors (see below), whose sum is σ = 120587892480. Its totient is φ = 45180777600.

The previous prime is 78724410119. The next prime is 78724410179. The reversal of 78724410171 is 17101442787.

It is not a de Polignac number, because 78724410171 - 2¹⁹ = 78723885883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78724410179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1466521 + ... + 1519253.

It is an arithmetic number, because the mean of its divisors is an integer number (3768371640).

Almost surely, 2^78724410171 is an apocalyptic number.

78724410171 is a deficient number, since it is larger than the sum of its proper divisors (41863482309).

78724410171 is a wasteful number, since it uses less digits than its factorization.

78724410171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55147.

The product of its (nonzero) digits is 87808, while the sum is 42.

The spelling of 78724410171 in words is "seventy-eight billion, seven hundred twenty-four million, four hundred ten thousand, one hundred seventy-one".