78108444651 has 16 divisors (see below), whose sum is σ = 106672353920. Its totient is φ = 50810820480.

The previous prime is 78108444587. The next prime is 78108444677. The reversal of 78108444651 is 15644480187.

It is not a de Polignac number, because 78108444651 - 2⁶ = 78108444587 is a prime.

It is a super-2 number, since 2×78108444651² (a number of 23 digits) contains 22 as substring.

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 78108444651.

It is not an unprimeable number, because it can be changed into a prime (78108444691) 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 15 ways as a sum of consecutive naturals, for example, 169885 + ... + 430206.

It is an arithmetic number, because the mean of its divisors is an integer number (6667022120).

Almost surely, 2^78108444651 is an apocalyptic number.

78108444651 is a deficient number, since it is larger than the sum of its proper divisors (28563909269).

78108444651 is a wasteful number, since it uses less digits than its factorization.

78108444651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601146.

The product of its (nonzero) digits is 860160, while the sum is 48.

The spelling of 78108444651 in words is "seventy-eight billion, one hundred eight million, four hundred forty-four thousand, six hundred fifty-one".