78885137629 has 16 divisors (see below), whose sum is σ = 83740608000. Its totient is φ = 74203176960.

The previous prime is 78885137563. The next prime is 78885137633. The reversal of 78885137629 is 92673158887.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78885137629 - 2²⁵ = 78851583197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78885137659) 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 15 ways as a sum of consecutive naturals, for example, 79524 + ... + 405085.

It is an arithmetic number, because the mean of its divisors is an integer number (5233788000).

Almost surely, 2^78885137629 is an apocalyptic number.

It is an amenable number.

78885137629 is a deficient number, since it is larger than the sum of its proper divisors (4855470371).

78885137629 is a wasteful number, since it uses less digits than its factorization.

78885137629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484788.

The product of its digits is 40642560, while the sum is 64.

The spelling of 78885137629 in words is "seventy-eight billion, eight hundred eighty-five million, one hundred thirty-seven thousand, six hundred twenty-nine".