25729911321156 has 729 divisors, whose sum is σ = 81368074284861. Its totient is φ = 6834924746496.

The previous prime is 25729911321143. The next prime is 25729911321161. The reversal of 25729911321156 is 65112311992752.

The square root of 25729911321156 is 5072466.

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

25729911321156 is a `hidden beast` number, since 2 + 5 + 7 + 299 + 11 + 321 + 15 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4940688690756 + 20789222630400 = 2222766^2 + 4559520^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 242 ways as a sum of consecutive naturals, for example, 289100127160 + ... + 289100127248.

Almost surely, 2^{25729911321156} is an apocalyptic number.

25729911321156 is the 5072466-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25729911321156

25729911321156 is an abundant number, since it is smaller than the sum of its proper divisors (55638162963705).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25729911321156 is a wasteful number, since it uses less digits than its factorization.

25729911321156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 183 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The spelling of 25729911321156 in words is "twenty-five trillion, seven hundred twenty-nine billion, nine hundred eleven million, three hundred twenty-one thousand, one hundred fifty-six".