27497987425 has 6 divisors (see below), whose sum is σ = 34097504438. Its totient is φ = 21998389920.

The previous prime is 27497987423. The next prime is 27497987449. The reversal of 27497987425 is 52478979472.

It can be written as a sum of positive squares in 3 ways, for example, as 8969605264 + 18528382161 = 94708^2 + 136119^2 .

It is not a de Polignac number, because 27497987425 - 2¹ = 27497987423 is a prime.

It is a super-2 number, since 2×27497987425² (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 (27497987423) 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, 549959724 + ... + 549959773.

Almost surely, 2^27497987425 is an apocalyptic number.

27497987425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27497987425 is a deficient number, since it is larger than the sum of its proper divisors (6599517013).

27497987425 is a wasteful number, since it uses less digits than its factorization.

27497987425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099919507 (or 1099919502 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 64.

It can be divided in two parts, 274979 and 87425, that added together give a square (362404 = 602²).

The spelling of 27497987425 in words is "twenty-seven billion, four hundred ninety-seven million, nine hundred eighty-seven thousand, four hundred twenty-five".