32166516725 has 18 divisors (see below), whose sum is σ = 46398560994. Its totient is φ = 22057039200.

The previous prime is 32166516721. The next prime is 32166516727. The reversal of 32166516725 is 52761566123.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 331749796 + 31834766929 = 18214^2 + 178423^2 .

It is not a de Polignac number, because 32166516725 - 2² = 32166516721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32166516721) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13127966 + ... + 13130415.

It is an arithmetic number, because the mean of its divisors is an integer number (2577697833).

Almost surely, 2^32166516725 is an apocalyptic number.

32166516725 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

32166516725 is a deficient number, since it is larger than the sum of its proper divisors (14232044269).

32166516725 is a wasteful number, since it uses less digits than its factorization.

32166516725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26258405 (or 26258393 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The spelling of 32166516725 in words is "thirty-two billion, one hundred sixty-six million, five hundred sixteen thousand, seven hundred twenty-five".