68154143731853 has 8 divisors (see below), whose sum is σ = 68176236817080. Its totient is φ = 68132053070080.

The previous prime is 68154143731837. The next prime is 68154143731871. The reversal of 68154143731853 is 35813734145186.

It can be written as a sum of positive squares in 4 ways, for example, as 4826576120809 + 63327567611044 = 2196947^2 + 7957862^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68154143731853 - 2⁴ = 68154143731837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68154143731792 and 68154143731801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68154143731813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56519243 + ... + 57712503.

It is an arithmetic number, because the mean of its divisors is an integer number (8522029602135).

Almost surely, 2^{68154143731853} is an apocalyptic number.

It is an amenable number.

68154143731853 is a deficient number, since it is larger than the sum of its proper divisors (22093085227).

68154143731853 is a wasteful number, since it uses less digits than its factorization.

68154143731853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211727.

The product of its digits is 29030400, while the sum is 59.

The spelling of 68154143731853 in words is "sixty-eight trillion, one hundred fifty-four billion, one hundred forty-three million, seven hundred thirty-one thousand, eight hundred fifty-three".