268021653 has 8 divisors (see below), whose sum is σ = 357638016. Its totient is φ = 178543200.

The previous prime is 268021639. The next prime is 268021669. The reversal of 268021653 is 356120862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 268021653 - 2¹³ = 268013461 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268021613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29853 + ... + 37778.

It is an arithmetic number, because the mean of its divisors is an integer number (44704752).

Almost surely, 2^268021653 is an apocalyptic number.

It is an amenable number.

268021653 is a deficient number, since it is larger than the sum of its proper divisors (89616363).

268021653 is a wasteful number, since it uses less digits than its factorization.

268021653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68955.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 268021653 is about 16371.3668641320. The cubic root of 268021653 is about 644.7479358798.

The spelling of 268021653 in words is "two hundred sixty-eight million, twenty-one thousand, six hundred fifty-three".