68035561340669 has 8 divisors (see below), whose sum is σ = 73941259327320. Its totient is φ = 62225890963776.

The previous prime is 68035561340633. The next prime is 68035561340753. The reversal of 68035561340669 is 96604316553086.

It can be written as a sum of positive squares in 4 ways, for example, as 24647124080569 + 43388437260100 = 4964587^2 + 6586990^2 .

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 68035561340669 - 2¹⁶ = 68035561275133 is a prime.

It is a super-2 number, since 2×68035561340669² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68035561340609) 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, 24006900962 + ... + 24006903795.

It is an arithmetic number, because the mean of its divisors is an integer number (9242657415915).

Almost surely, 2^{68035561340669} is an apocalyptic number.

It is an amenable number.

68035561340669 is a deficient number, since it is larger than the sum of its proper divisors (5905697986651).

68035561340669 is a wasteful number, since it uses less digits than its factorization.

68035561340669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48013804879.

The product of its (nonzero) digits is 83980800, while the sum is 62.

The spelling of 68035561340669 in words is "sixty-eight trillion, thirty-five billion, five hundred sixty-one million, three hundred forty thousand, six hundred sixty-nine".