78925256149 has 6 divisors (see below), whose sum is σ = 78982320066. Its totient is φ = 78868207440.

The previous prime is 78925256129. The next prime is 78925256167. The reversal of 78925256149 is 94165252987.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 35037101124 + 43888155025 = 187182^2 + 209495^2 .

It is not a de Polignac number, because 78925256149 - 2⁵ = 78925256117 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78925256093 and 78925256102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78925256129) 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 5 ways as a sum of consecutive naturals, for example, 11718787 + ... + 11725519.

It is an arithmetic number, because the mean of its divisors is an integer number (13163720011).

Almost surely, 2^78925256149 is an apocalyptic number.

It is an amenable number.

78925256149 is a deficient number, since it is larger than the sum of its proper divisors (57063917).

78925256149 is an frugal number, since it uses more digits than its factorization.

78925256149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15207 (or 8474 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 58.

The spelling of 78925256149 in words is "seventy-eight billion, nine hundred twenty-five million, two hundred fifty-six thousand, one hundred forty-nine".