21676355071425 has 72 divisors (see below), whose sum is σ = 39322867487904. Its totient is φ = 11412618094080.

The previous prime is 21676355071417. The next prime is 21676355071447. The reversal of 21676355071425 is 52417055367612.

It is a happy number.

21676355071425 is a `hidden beast` number, since 2 + 1 + 6 + 7 + 63 + 550 + 7 + 1 + 4 + 25 = 666.

It is not a de Polignac number, because 21676355071425 - 2³ = 21676355071417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 23774014 + ... + 24668936.

It is an arithmetic number, because the mean of its divisors is an integer number (546150937332).

Almost surely, 2^{21676355071425} is an apocalyptic number.

21676355071425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21676355071425 is a deficient number, since it is larger than the sum of its proper divisors (17646512416479).

21676355071425 is a wasteful number, since it uses less digits than its factorization.

21676355071425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896319 (or 896311 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 54.

The spelling of 21676355071425 in words is "twenty-one trillion, six hundred seventy-six billion, three hundred fifty-five million, seventy-one thousand, four hundred twenty-five".