253655423999 has 4 divisors (see below), whose sum is σ = 253664096664. Its totient is φ = 253646751336.

The previous prime is 253655423993. The next prime is 253655424013. The reversal of 253655423999 is 999324556352.

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

It is a cyclic number.

It is not a de Polignac number, because 253655423999 - 2¹² = 253655419903 is a prime.

It is a super-2 number, since 2×253655423999² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253655423993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4292312 + ... + 4351005.

It is an arithmetic number, because the mean of its divisors is an integer number (63416024166).

Almost surely, 2^253655423999 is an apocalyptic number.

253655423999 is a deficient number, since it is larger than the sum of its proper divisors (8672665).

253655423999 is an equidigital number, since it uses as much as digits as its factorization.

253655423999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8672664.

The product of its digits is 78732000, while the sum is 62.

The spelling of 253655423999 in words is "two hundred fifty-three billion, six hundred fifty-five million, four hundred twenty-three thousand, nine hundred ninety-nine".