1662601513225 has 24 divisors (see below), whose sum is σ = 2091392928000. Its totient is φ = 1310935866240.

The previous prime is 1662601513211. The next prime is 1662601513229. The reversal of 1662601513225 is 5223151062661.

It is not a de Polignac number, because 1662601513225 - 2⁹ = 1662601512713 is a prime.

It is a super-3 number, since 3×1662601513225³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1662601513229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384036 + ... + 1863514.

It is an arithmetic number, because the mean of its divisors is an integer number (87141372000).

Almost surely, 2^{1662601513225} is an apocalyptic number.

It is an amenable number.

1662601513225 is a deficient number, since it is larger than the sum of its proper divisors (428791414775).

1662601513225 is a wasteful number, since it uses less digits than its factorization.

1662601513225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480137 (or 1480132 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

Adding to 1662601513225 its reverse (5223151062661), we get a palindrome (6885752575886).

The spelling of 1662601513225 in words is "one trillion, six hundred sixty-two billion, six hundred one million, five hundred thirteen thousand, two hundred twenty-five".