268121637401 has 4 divisors (see below), whose sum is σ = 268354181172. Its totient is φ = 267889093632.

The previous prime is 268121637397. The next prime is 268121637409. The reversal of 268121637401 is 104736121862.

268121637401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144130326025 + 123991311376 = 379645^2 + 352124^2 .

It is a cyclic number.

It is not a de Polignac number, because 268121637401 - 2² = 268121637397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268121637409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116270156 + ... + 116272461.

It is an arithmetic number, because the mean of its divisors is an integer number (67088545293).

Almost surely, 2^268121637401 is an apocalyptic number.

It is an amenable number.

268121637401 is a deficient number, since it is larger than the sum of its proper divisors (232543771).

268121637401 is a wasteful number, since it uses less digits than its factorization.

268121637401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232543770.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 268121637401 in words is "two hundred sixty-eight billion, one hundred twenty-one million, six hundred thirty-seven thousand, four hundred one".