78988956249 has 8 divisors (see below), whose sum is σ = 120364123840. Its totient is φ = 45136546416.

The previous prime is 78988956239. The next prime is 78988956283. The reversal of 78988956249 is 94265988987.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78988956249 - 2⁵ = 78988956217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78988956229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1880689414 + ... + 1880689455.

It is an arithmetic number, because the mean of its divisors is an integer number (15045515480).

Almost surely, 2^78988956249 is an apocalyptic number.

It is an amenable number.

78988956249 is a deficient number, since it is larger than the sum of its proper divisors (41375167591).

78988956249 is a wasteful number, since it uses less digits than its factorization.

78988956249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761378879.

The product of its digits is 627056640, while the sum is 75.

The spelling of 78988956249 in words is "seventy-eight billion, nine hundred eighty-eight million, nine hundred fifty-six thousand, two hundred forty-nine".