253256415633 has 12 divisors (see below), whose sum is σ = 393954424500. Its totient is φ = 155850101856.

The previous prime is 253256415631. The next prime is 253256415647. The reversal of 253256415633 is 336514652352.

253256415633 is a `hidden beast` number, since 2 + 5 + 3 + 2 + 5 + 6 + 4 + 1 + 5 + 633 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 159066964224 + 94189451409 = 398832^2 + 306903^2 .

It is not a de Polignac number, because 253256415633 - 2¹ = 253256415631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253256415631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1082292258 + ... + 1082292491.

It is an arithmetic number, because the mean of its divisors is an integer number (32829535375).

Almost surely, 2^253256415633 is an apocalyptic number.

It is an amenable number.

253256415633 is a deficient number, since it is larger than the sum of its proper divisors (140698008867).

253256415633 is a wasteful number, since it uses less digits than its factorization.

253256415633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164584768 (or 2164584765 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 45.

The spelling of 253256415633 in words is "two hundred fifty-three billion, two hundred fifty-six million, four hundred fifteen thousand, six hundred thirty-three".