68446752081 has 8 divisors (see below), whose sum is σ = 91263938304. Its totient is φ = 45630366960.

The previous prime is 68446752079. The next prime is 68446752091. The reversal of 68446752081 is 18025764486.

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

It is not a de Polignac number, because 68446752081 - 2¹ = 68446752079 is a prime.

It is a super-2 number, since 2×68446752081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68446752071) 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, 40411 + ... + 372191.

It is an arithmetic number, because the mean of its divisors is an integer number (11407992288).

Almost surely, 2^68446752081 is an apocalyptic number.

It is an amenable number.

68446752081 is a deficient number, since it is larger than the sum of its proper divisors (22817186223).

68446752081 is a wasteful number, since it uses less digits than its factorization.

68446752081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400551.

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 68446752081 in words is "sixty-eight billion, four hundred forty-six million, seven hundred fifty-two thousand, eighty-one".