21134625467761 has 8 divisors (see below), whose sum is σ = 23146134802560. Its totient is φ = 19178225977872.

The previous prime is 21134625467707. The next prime is 21134625467777. The reversal of 21134625467761 is 16776452643112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21134625467761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134625467701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13777460425 + ... + 13777461958.

It is an arithmetic number, because the mean of its divisors is an integer number (2893266850320).

Almost surely, 2^{21134625467761} is an apocalyptic number.

It is an amenable number.

21134625467761 is a deficient number, since it is larger than the sum of its proper divisors (2011509334799).

21134625467761 is a wasteful number, since it uses less digits than its factorization.

21134625467761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27554922455.

The product of its digits is 10160640, while the sum is 55.

The spelling of 21134625467761 in words is "twenty-one trillion, one hundred thirty-four billion, six hundred twenty-five million, four hundred sixty-seven thousand, seven hundred sixty-one".