25821276100 has 27 divisors (see below), whose sum is σ = 56035656327. Its totient is φ = 10327867680.

The previous prime is 25821276097. The next prime is 25821276113. The reversal of 25821276100 is 167212852.

It is a happy number.

The square root of 25821276100 is 160690.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3855664836 + 21965611264 = 62094^2 + 148208^2 .

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, 1598866 + ... + 1614934.

Almost surely, 2^25821276100 is an apocalyptic number.

25821276100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

25821276100 is the 160690-th square number.

It is an amenable number.

25821276100 is an abundant number, since it is smaller than the sum of its proper divisors (30214380227).

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

25821276100 is an frugal number, since it uses more digits than its factorization.

25821276100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32152 (or 16076 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

Adding to 25821276100 its reverse (167212852), we get a palindrome (25988488952).

The spelling of 25821276100 in words is "twenty-five billion, eight hundred twenty-one million, two hundred seventy-six thousand, one hundred".