253642651242 has 8 divisors (see below), whose sum is σ = 507285302496. Its totient is φ = 84547550412.

The previous prime is 253642651187. The next prime is 253642651261. The reversal of 253642651242 is 242156246352.

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

253642651242 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 253642651194 and 253642651203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21136887598 + ... + 21136887609.

It is an arithmetic number, because the mean of its divisors is an integer number (63410662812).

Almost surely, 2^253642651242 is an apocalyptic number.

253642651242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

253642651242 is a wasteful number, since it uses less digits than its factorization.

253642651242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42273775212.

The product of its digits is 691200, while the sum is 42.

Adding to 253642651242 its reverse (242156246352), we get a palindrome (495798897594).

The spelling of 253642651242 in words is "two hundred fifty-three billion, six hundred forty-two million, six hundred fifty-one thousand, two hundred forty-two".