27261872425 has 18 divisors (see below), whose sum is σ = 33994177098. Its totient is φ = 21687367680.

The previous prime is 27261872381. The next prime is 27261872459. The reversal of 27261872425 is 52427816272.

It can be written as a sum of positive squares in 9 ways, for example, as 13352264704 + 13909607721 = 115552^2 + 117939^2 .

It is not a de Polignac number, because 27261872425 - 2¹³ = 27261864233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11467837 + ... + 11470213.

Almost surely, 2^27261872425 is an apocalyptic number.

27261872425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27261872425 is a deficient number, since it is larger than the sum of its proper divisors (6732304673).

27261872425 is an frugal number, since it uses more digits than its factorization.

27261872425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4957 (or 2575 counting only the distinct ones).

The product of its digits is 752640, while the sum is 46.

The spelling of 27261872425 in words is "twenty-seven billion, two hundred sixty-one million, eight hundred seventy-two thousand, four hundred twenty-five".