253673566398 has 128 divisors (see below), whose sum is σ = 685961395200. Its totient is φ = 67833345024.

The previous prime is 253673566387. The next prime is 253673566429. The reversal of 253673566398 is 893665376352.

It is a happy number.

253673566398 is a `hidden beast` number, since 2 + 5 + 3 + 67 + 3 + 566 + 3 + 9 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1039986 + ... + 1260522.

It is an arithmetic number, because the mean of its divisors is an integer number (5359073400).

Almost surely, 2^253673566398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253673566398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342980697600).

253673566398 is an abundant number, since it is smaller than the sum of its proper divisors (432287828802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253673566398 is a wasteful number, since it uses less digits than its factorization.

253673566398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220751 (or 220745 counting only the distinct ones).

The product of its digits is 146966400, while the sum is 63.

The spelling of 253673566398 in words is "two hundred fifty-three billion, six hundred seventy-three million, five hundred sixty-six thousand, three hundred ninety-eight".