27920739025 has 27 divisors (see below), whose sum is σ = 36217381809. Its totient is φ = 21350730720.

The previous prime is 27920739023. The next prime is 27920739029. The reversal of 27920739025 is 52093702972.

The square root of 27920739025 is 167095.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6090085521 + 21830653504 = 78039^2 + 147752^2 .

It is not a de Polignac number, because 27920739025 - 2¹ = 27920739023 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27920739023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 19215199 + ... + 19216651.

Almost surely, 2^27920739025 is an apocalyptic number.

27920739025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27920739025 is the 167095-th square number.

27920739025 is the 83548-th centered octagonal number.

It is an amenable number.

27920739025 is a deficient number, since it is larger than the sum of its proper divisors (8296642784).

27920739025 is an frugal number, since it uses more digits than its factorization.

27920739025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962 (or 1481 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 46.

The spelling of 27920739025 in words is "twenty-seven billion, nine hundred twenty million, seven hundred thirty-nine thousand, twenty-five".