253561121434 has 64 divisors (see below), whose sum is σ = 424202572800. Its totient is φ = 113303232000.

The previous prime is 253561121431. The next prime is 253561121503. The reversal of 253561121434 is 434121165352.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 253561121393 and 253561121402.

It is not an unprimeable number, because it can be changed into a prime (253561121431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3892734 + ... + 3957334.

It is an arithmetic number, because the mean of its divisors is an integer number (6628165200).

Almost surely, 2^253561121434 is an apocalyptic number.

253561121434 is a deficient number, since it is larger than the sum of its proper divisors (170641451366).

253561121434 is a wasteful number, since it uses less digits than its factorization.

253561121434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64759.

The product of its digits is 86400, while the sum is 37.

Adding to 253561121434 its reverse (434121165352), we get a palindrome (687682286786).

The spelling of 253561121434 in words is "two hundred fifty-three billion, five hundred sixty-one million, one hundred twenty-one thousand, four hundred thirty-four".