68525350381 has 2 divisors, whose sum is σ = 68525350382. Its totient is φ = 68525350380.

The previous prime is 68525350349. The next prime is 68525350427. The reversal of 68525350381 is 18305352586.

It is a happy number.

It is an a-pointer prime, because the next prime (68525350427) can be obtained adding 68525350381 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47364993225 + 21160357156 = 217635^2 + 145466^2 .

It is a cyclic number.

It is not a de Polignac number, because 68525350381 - 2⁵ = 68525350349 is a prime.

It is a super-2 number, since 2×68525350381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68525350321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34262675190 + 34262675191.

It is an arithmetic number, because the mean of its divisors is an integer number (34262675191).

Almost surely, 2^68525350381 is an apocalyptic number.

It is an amenable number.

68525350381 is a deficient number, since it is larger than the sum of its proper divisors (1).

68525350381 is an equidigital number, since it uses as much as digits as its factorization.

68525350381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 68525350381 in words is "sixty-eight billion, five hundred twenty-five million, three hundred fifty thousand, three hundred eighty-one".