65502724225 has 27 divisors (see below), whose sum is σ = 86310938761. Its totient is φ = 49303318400.

The previous prime is 65502724223. The next prime is 65502724283. The reversal of 65502724225 is 52242720556.

It is a happy number.

The square root of 65502724225 is 255935.

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 1532174449 + 63970549776 = 39143^2 + 252924^2 .

It is not a de Polignac number, because 65502724225 - 2¹ = 65502724223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65502724223) 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, 21752970 + ... + 21755980.

Almost surely, 2^65502724225 is an apocalyptic number.

65502724225 is the 255935-th square number.

65502724225 is the 127968-th centered octagonal number.

It is an amenable number.

65502724225 is a deficient number, since it is larger than the sum of its proper divisors (20808214536).

65502724225 is an frugal number, since it uses more digits than its factorization.

65502724225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066 (or 3033 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 40.

The spelling of 65502724225 in words is "sixty-five billion, five hundred two million, seven hundred twenty-four thousand, two hundred twenty-five".