64502442349225 has 12 divisors (see below), whose sum is σ = 80049625576540. Its totient is φ = 51558988032000.

The previous prime is 64502442349187. The next prime is 64502442349253. The reversal of 64502442349225 is 52294324420546.

It can be written as a sum of positive squares in 6 ways, for example, as 23327325446569 + 41175116902656 = 4829837^2 + 6416784^2 .

It is not a de Polignac number, because 64502442349225 - 2²¹ = 64502440252073 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1074115560 + ... + 1074175609.

Almost surely, 2^{64502442349225} is an apocalyptic number.

It is an amenable number.

64502442349225 is a deficient number, since it is larger than the sum of its proper divisors (15547183227315).

64502442349225 is a wasteful number, since it uses less digits than its factorization.

64502442349225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148292380 (or 2148292375 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 52.

It can be divided in two parts, 645024 and 42349225, that added together give a square (42994249 = 6557²).

The spelling of 64502442349225 in words is "sixty-four trillion, five hundred two billion, four hundred forty-two million, three hundred forty-nine thousand, two hundred twenty-five".