68856808253653 has 32 divisors (see below), whose sum is σ = 83779260560640. Its totient is φ = 55244030607360.

The previous prime is 68856808253633. The next prime is 68856808253731. The reversal of 68856808253653 is 35635280865886.

It is a de Polignac number, because none of the positive numbers 2^k-68856808253653 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 (68856808253633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76746078 + ... + 77638096.

It is an arithmetic number, because the mean of its divisors is an integer number (2618101892520).

Almost surely, 2^{68856808253653} is an apocalyptic number.

It is an amenable number.

68856808253653 is a deficient number, since it is larger than the sum of its proper divisors (14922452306987).

68856808253653 is a wasteful number, since it uses less digits than its factorization.

68856808253653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895597.

The product of its (nonzero) digits is 1990656000, while the sum is 73.

The spelling of 68856808253653 in words is "sixty-eight trillion, eight hundred fifty-six billion, eight hundred eight million, two hundred fifty-three thousand, six hundred fifty-three".