253461337640 has 48 divisors (see below), whose sum is σ = 663396261300. Its totient is φ = 86901029376.

The previous prime is 253461337607. The next prime is 253461337697. The reversal of 253461337640 is 46733164352.

It can be written as a sum of positive squares in 2 ways, for example, as 253437737476 + 23600164 = 503426^2 + 4858^2 .

It is a junction number, because it is equal to n+sod(n) for n = 253461337591 and 253461337600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64656545 + ... + 64660464.

Almost surely, 2^253461337640 is an apocalyptic number.

253461337640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253461337640 is an abundant number, since it is smaller than the sum of its proper divisors (409934923660).

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

253461337640 is a wasteful number, since it uses less digits than its factorization.

253461337640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129317034 (or 129317023 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 44.

The spelling of 253461337640 in words is "two hundred fifty-three billion, four hundred sixty-one million, three hundred thirty-seven thousand, six hundred forty".