68215451535 has 64 divisors (see below), whose sum is σ = 151196175360. Its totient is φ = 28349274240.

The previous prime is 68215451533. The next prime is 68215451539. The reversal of 68215451535 is 53515451286.

68215451535 is a `hidden beast` number, since 6 + 82 + 1 + 54 + 515 + 3 + 5 = 666.

It is not a de Polignac number, because 68215451535 - 2¹ = 68215451533 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68215451533) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3270772 + ... + 3291561.

It is an arithmetic number, because the mean of its divisors is an integer number (2362440240).

Almost surely, 2^68215451535 is an apocalyptic number.

68215451535 is an abundant number, since it is smaller than the sum of its proper divisors (82980723825).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68215451535 is a wasteful number, since it uses less digits than its factorization.

68215451535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6562365 (or 6562359 counting only the distinct ones).

The product of its digits is 720000, while the sum is 45.

The spelling of 68215451535 in words is "sixty-eight billion, two hundred fifteen million, four hundred fifty-one thousand, five hundred thirty-five".