27250188921 has 6 divisors (see below), whose sum is σ = 39361384010. Its totient is φ = 18166792608.

The previous prime is 27250188887. The next prime is 27250188937. The reversal of 27250188921 is 12988105272.

It can be written as a sum of positive squares in only one way, i.e., 25845063696 + 1405125225 = 160764^2 + 37485^2 .

It is not a de Polignac number, because 27250188921 - 2⁶ = 27250188857 is a prime.

It is a super-2 number, since 2×27250188921² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27250188991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1513899376 + ... + 1513899393.

Almost surely, 2^27250188921 is an apocalyptic number.

It is an amenable number.

27250188921 is a deficient number, since it is larger than the sum of its proper divisors (12111195089).

27250188921 is a wasteful number, since it uses less digits than its factorization.

27250188921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027798775 (or 3027798772 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 27250188921 in words is "twenty-seven billion, two hundred fifty million, one hundred eighty-eight thousand, nine hundred twenty-one".