21925075616761 has 4 divisors (see below), whose sum is σ = 21959173713232. Its totient is φ = 21890977520292.

The previous prime is 21925075616723. The next prime is 21925075616831. The reversal of 21925075616761 is 16761657052912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21925075616761 - 2²⁷ = 21924941399033 is a prime.

It is a super-2 number, since 2×21925075616761² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21925075616696 and 21925075616705.

It is not an unprimeable number, because it can be changed into a prime (21925075656761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17049047271 + ... + 17049048556.

It is an arithmetic number, because the mean of its divisors is an integer number (5489793428308).

Almost surely, 2^{21925075616761} is an apocalyptic number.

It is an amenable number.

21925075616761 is a deficient number, since it is larger than the sum of its proper divisors (34098096471).

21925075616761 is an equidigital number, since it uses as much as digits as its factorization.

21925075616761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34098096470.

The product of its (nonzero) digits is 9525600, while the sum is 58.

The spelling of 21925075616761 in words is "twenty-one trillion, nine hundred twenty-five billion, seventy-five million, six hundred sixteen thousand, seven hundred sixty-one".