268721572451 has 16 divisors (see below), whose sum is σ = 288614050560. Its totient is φ = 249634277760.

The previous prime is 268721572447. The next prime is 268721572453. The reversal of 268721572451 is 154275127862.

268721572451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 268721572451 - 2² = 268721572447 is a prime.

It is a super-2 number, since 2×268721572451² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 268721572451.

It is not an unprimeable number, because it can be changed into a prime (268721572453) 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 15 ways as a sum of consecutive naturals, for example, 708380 + ... + 1019433.

It is an arithmetic number, because the mean of its divisors is an integer number (18038378160).

Almost surely, 2^268721572451 is an apocalyptic number.

268721572451 is a deficient number, since it is larger than the sum of its proper divisors (19892478109).

268721572451 is a wasteful number, since it uses less digits than its factorization.

268721572451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728046.

The product of its digits is 1881600, while the sum is 50.

The spelling of 268721572451 in words is "two hundred sixty-eight billion, seven hundred twenty-one million, five hundred seventy-two thousand, four hundred fifty-one".