505420133440 has 56 divisors (see below), whose sum is σ = 1204231515840. Its totient is φ = 202050498048.

The previous prime is 505420133429. The next prime is 505420133473. The reversal of 505420133440 is 44331024505.

It is a super-2 number, since 2×505420133440² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93021 + ... + 1009699.

Almost surely, 2^505420133440 is an apocalyptic number.

It is an amenable number.

505420133440 is an abundant number, since it is smaller than the sum of its proper divisors (698811382400).

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

505420133440 is a wasteful number, since it uses less digits than its factorization.

505420133440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918419 (or 918409 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 505420133440 its reverse (44331024505), we get a palindrome (549751157945).

The spelling of 505420133440 in words is "five hundred five billion, four hundred twenty million, one hundred thirty-three thousand, four hundred forty".