21146553260025 has 48 divisors (see below), whose sum is σ = 36168765408000. Its totient is φ = 10888998453760.

The previous prime is 21146553260009. The next prime is 21146553260111. The reversal of 21146553260025 is 52006235564112.

It is not a de Polignac number, because 21146553260025 - 2⁴ = 21146553260009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118180576 + ... + 118359374.

It is an arithmetic number, because the mean of its divisors is an integer number (753515946000).

Almost surely, 2^{21146553260025} is an apocalyptic number.

21146553260025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21146553260025 is a deficient number, since it is larger than the sum of its proper divisors (15022212147975).

21146553260025 is a wasteful number, since it uses less digits than its factorization.

21146553260025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233218 (or 233213 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 21146553260025 in words is "twenty-one trillion, one hundred forty-six billion, five hundred fifty-three million, two hundred sixty thousand, twenty-five".