32720675751 has 36 divisors (see below), whose sum is σ = 50513467680. Its totient is φ = 20403938880.

The previous prime is 32720675681. The next prime is 32720675753. The reversal of 32720675751 is 15757602723.

32720675751 is a `hidden beast` number, since 3 + 2 + 72 + 0 + 6 + 7 + 575 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-32720675751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 32720675697 and 32720675706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32720675753) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 192931 + ... + 320411.

It is an arithmetic number, because the mean of its divisors is an integer number (1403151880).

Almost surely, 2^32720675751 is an apocalyptic number.

32720675751 is a deficient number, since it is larger than the sum of its proper divisors (17792791929).

32720675751 is a wasteful number, since it uses less digits than its factorization.

32720675751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127604 (or 127582 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 45.

The spelling of 32720675751 in words is "thirty-two billion, seven hundred twenty million, six hundred seventy-five thousand, seven hundred fifty-one".