253669864921 has 8 divisors (see below), whose sum is σ = 279470671488. Its totient is φ = 228325710000.

The previous prime is 253669864879. The next prime is 253669864927. The reversal of 253669864921 is 129468966352.

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

It is a cyclic number.

It is not a de Polignac number, because 253669864921 - 2¹⁹ = 253669340633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253669864921.

It is not an unprimeable number, because it can be changed into a prime (253669864927) 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, 114161745 + ... + 114163966.

It is an arithmetic number, because the mean of its divisors is an integer number (34933833936).

Almost surely, 2^253669864921 is an apocalyptic number.

It is an amenable number.

253669864921 is a deficient number, since it is larger than the sum of its proper divisors (25800806567).

253669864921 is a wasteful number, since it uses less digits than its factorization.

253669864921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228325823.

The product of its digits is 33592320, while the sum is 61.

The spelling of 253669864921 in words is "two hundred fifty-three billion, six hundred sixty-nine million, eight hundred sixty-four thousand, nine hundred twenty-one".