27051721000 has 32 divisors (see below), whose sum is σ = 63301029480. Its totient is φ = 10820688000.

The previous prime is 27051720973. The next prime is 27051721001. The reversal of 27051721000 is 12715072.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5947185924 + 21104535076 = 77118^2 + 145274^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (27051721001) 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, 13524861 + ... + 13526860.

Almost surely, 2^27051721000 is an apocalyptic number.

27051721000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27051721000 is an abundant number, since it is smaller than the sum of its proper divisors (36249308480).

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

27051721000 is a wasteful number, since it uses less digits than its factorization.

27051721000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27051742 (or 27051728 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The spelling of 27051721000 in words is "twenty-seven billion, fifty-one million, seven hundred twenty-one thousand".