68813750133 has 6 divisors (see below), whose sum is σ = 99397639094. Its totient is φ = 45875833416.

The previous prime is 68813750129. The next prime is 68813750143. The reversal of 68813750133 is 33105731886.

68813750133 is a `hidden beast` number, since 6 + 8 + 8 + 137 + 501 + 3 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44420620644 + 24393129489 = 210762^2 + 156183^2 .

It is not a de Polignac number, because 68813750133 - 2² = 68813750129 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 (68813750113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3822986110 + ... + 3822986127.

Almost surely, 2^68813750133 is an apocalyptic number.

It is an amenable number.

68813750133 is a deficient number, since it is larger than the sum of its proper divisors (30583888961).

68813750133 is a wasteful number, since it uses less digits than its factorization.

68813750133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7645972243 (or 7645972240 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 68813750133 in words is "sixty-eight billion, eight hundred thirteen million, seven hundred fifty thousand, one hundred thirty-three".