68201577881 has 2 divisors, whose sum is σ = 68201577882. Its totient is φ = 68201577880.

The previous prime is 68201577817. The next prime is 68201577953. The reversal of 68201577881 is 18877510286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67504353856 + 697224025 = 259816^2 + 26405^2 .

It is a cyclic number.

It is not a de Polignac number, because 68201577881 - 2⁶ = 68201577817 is a prime.

It is a super-2 number, since 2×68201577881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68201577581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34100788940 + 34100788941.

It is an arithmetic number, because the mean of its divisors is an integer number (34100788941).

Almost surely, 2^68201577881 is an apocalyptic number.

It is an amenable number.

68201577881 is a deficient number, since it is larger than the sum of its proper divisors (1).

68201577881 is an equidigital number, since it uses as much as digits as its factorization.

68201577881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1505280, while the sum is 53.

The spelling of 68201577881 in words is "sixty-eight billion, two hundred one million, five hundred seventy-seven thousand, eight hundred eighty-one".