279780987489025 has 81 divisors (see below), whose sum is σ = 383702651506083. Its totient is φ = 202221244552800.

The previous prime is 279780987488969. The next prime is 279780987489049. The reversal of 279780987489025 is 520984789087972.

The square root of 279780987489025 is 16726655.

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., 100721155496049 + 179059831992976 = 10035993^2 + 13381324^2 .

It is not a de Polignac number, because 279780987489025 - 2⁷ = 279780987488897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 164673917626 + ... + 164673919324.

Almost surely, 2^{279780987489025} is an apocalyptic number.

279780987489025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

279780987489025 is the 16726655-th square number.

279780987489025 is the 8363328-th centered octagonal number.

It is an amenable number.

279780987489025 is a deficient number, since it is larger than the sum of its proper divisors (103921664017058).

279780987489025 is an frugal number, since it uses more digits than its factorization.

279780987489025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788 (or 1894 counting only the distinct ones).

The product of its (nonzero) digits is 10241925120, while the sum is 85.

The spelling of 279780987489025 in words is "two hundred seventy-nine trillion, seven hundred eighty billion, nine hundred eighty-seven million, four hundred eighty-nine thousand, twenty-five".