135442927620025 has 9 divisors (see below), whose sum is σ = 167949302404431. Its totient is φ = 108354295544040.

The previous prime is 135442927620017. The next prime is 135442927620037. The reversal of 135442927620025 is 520026729244531.

The square root of 135442927620025 is 11637995.

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

It can be written as a sum of positive squares in only one way, i.e., 48759453943209 + 86683473676816 = 6982797^2 + 9310396^2 .

It is not a de Polignac number, because 135442927620025 - 2³ = 135442927620017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 57026176 + ... + 59353774.

Almost surely, 2^{135442927620025} is an apocalyptic number.

135442927620025 is the 11637995-th square number.

135442927620025 is the 5818998-th centered octagonal number.

It is an amenable number.

135442927620025 is a deficient number, since it is larger than the sum of its proper divisors (32506374784406).

135442927620025 is an frugal number, since it uses more digits than its factorization.

135442927620025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4655208 (or 2327604 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 52.

The spelling of 135442927620025 in words is "one hundred thirty-five trillion, four hundred forty-two billion, nine hundred twenty-seven million, six hundred twenty thousand, twenty-five".