78980671225 has 9 divisors (see below), whose sum is σ = 97937774767. Its totient is φ = 63183412840.

The previous prime is 78980671213. The next prime is 78980671241. The reversal of 78980671225 is 52217608987.

The square root of 78980671225 is 281035.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 28433041641 + 50547629584 = 168621^2 + 224828^2 .

It is not a de Polignac number, because 78980671225 - 2⁵ = 78980671193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1377072 + ... + 1433278.

Almost surely, 2^78980671225 is an apocalyptic number.

78980671225 is the 281035-th square number.

78980671225 is the 140518-th centered octagonal number.

It is an amenable number.

78980671225 is a deficient number, since it is larger than the sum of its proper divisors (18957103542).

78980671225 is an frugal number, since it uses more digits than its factorization.

78980671225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112424 (or 56212 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 78980671225 in words is "seventy-eight billion, nine hundred eighty million, six hundred seventy-one thousand, two hundred twenty-five".