21277403667258 has 16 divisors (see below), whose sum is σ = 43276075256160. Its totient is φ = 6972256568816.

The previous prime is 21277403667137. The next prime is 21277403667301. The reversal of 21277403667258 is 85276630477212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30052829685 + ... + 30052830392.

It is an arithmetic number, because the mean of its divisors is an integer number (2704754703510).

Almost surely, 2^{21277403667258} is an apocalyptic number.

21277403667258 is an abundant number, since it is smaller than the sum of its proper divisors (21998671588902).

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

21277403667258 is a wasteful number, since it uses less digits than its factorization.

21277403667258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60105660141.

The product of its (nonzero) digits is 47416320, while the sum is 60.

The spelling of 21277403667258 in words is "twenty-one trillion, two hundred seventy-seven billion, four hundred three million, six hundred sixty-seven thousand, two hundred fifty-eight".