78242614647 has 32 divisors (see below), whose sum is σ = 108193522176. Its totient is φ = 50272588800.

The previous prime is 78242614643. The next prime is 78242614663. The reversal of 78242614647 is 74641624287.

It is a happy number.

It is not a de Polignac number, because 78242614647 - 2² = 78242614643 is a prime.

It is a super-2 number, since 2×78242614647² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78242614647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78242614643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1734772 + ... + 1779302.

It is an arithmetic number, because the mean of its divisors is an integer number (3381047568).

Almost surely, 2^78242614647 is an apocalyptic number.

78242614647 is a deficient number, since it is larger than the sum of its proper divisors (29950907529).

78242614647 is a wasteful number, since it uses less digits than its factorization.

78242614647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44791.

The product of its digits is 3612672, while the sum is 51.

The spelling of 78242614647 in words is "seventy-eight billion, two hundred forty-two million, six hundred fourteen thousand, six hundred forty-seven".