67701388448081 has 16 divisors (see below), whose sum is σ = 71764211863440. Its totient is φ = 63647503319040.

The previous prime is 67701388448051. The next prime is 67701388448173. The reversal of 67701388448081 is 18084488310776.

It can be written as a sum of positive squares in 8 ways, for example, as 8013541872400 + 59687846575681 = 2830820^2 + 7725791^2 .

It is a cyclic number.

It is not a de Polignac number, because 67701388448081 - 2²² = 67701384253777 is a prime.

It is a super-2 number, since 2×67701388448081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67701388447999 and 67701388448017.

It is not an unprimeable number, because it can be changed into a prime (67701388448051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405117461 + ... + 405284541.

It is an arithmetic number, because the mean of its divisors is an integer number (4485263241465).

Almost surely, 2^{67701388448081} is an apocalyptic number.

It is an amenable number.

67701388448081 is a deficient number, since it is larger than the sum of its proper divisors (4062823415359).

67701388448081 is a wasteful number, since it uses less digits than its factorization.

67701388448081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193684.

The product of its (nonzero) digits is 57802752, while the sum is 65.

The spelling of 67701388448081 in words is "sixty-seven trillion, seven hundred one billion, three hundred eighty-eight million, four hundred forty-eight thousand, eighty-one".