78882038025721 has 32 divisors (see below), whose sum is σ = 95466846816000. Its totient is φ = 65073116384640.

The previous prime is 78882038025673. The next prime is 78882038025737. The reversal of 78882038025721 is 12752083028887.

It is not a de Polignac number, because 78882038025721 - 2¹⁹ = 78882037501433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78882038025721.

It is not an unprimeable number, because it can be changed into a prime (78882038025821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9554695 + ... + 15781516.

It is an arithmetic number, because the mean of its divisors is an integer number (2983338963000).

Almost surely, 2^{78882038025721} is an apocalyptic number.

It is an amenable number.

78882038025721 is a deficient number, since it is larger than the sum of its proper divisors (16584808790279).

78882038025721 is a wasteful number, since it uses less digits than its factorization.

78882038025721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25336574 (or 25336560 counting only the distinct ones).

The product of its (nonzero) digits is 24084480, while the sum is 61.

The spelling of 78882038025721 in words is "seventy-eight trillion, eight hundred eighty-two billion, thirty-eight million, twenty-five thousand, seven hundred twenty-one".