253490655420 has 144 divisors (see below), whose sum is σ = 775089675360. Its totient is φ = 67056076800.

The previous prime is 253490655413. The next prime is 253490655421. The reversal of 253490655420 is 24556094352.

253490655420 is a `hidden beast` number, since 2 + 5 + 3 + 4 + 90 + 6 + 554 + 2 + 0 = 666.

It is a super-2 number, since 2×253490655420² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253490655421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37051200 + ... + 37058040.

It is an arithmetic number, because the mean of its divisors is an integer number (5382567190).

Almost surely, 2^253490655420 is an apocalyptic number.

253490655420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253490655420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387544837680).

253490655420 is an abundant number, since it is smaller than the sum of its proper divisors (521599019940).

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

253490655420 is a wasteful number, since it uses less digits than its factorization.

253490655420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8476 (or 8471 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 253490655420 in words is "two hundred fifty-three billion, four hundred ninety million, six hundred fifty-five thousand, four hundred twenty".