501540053440 has 56 divisors (see below), whose sum is σ = 1246218020640. Its totient is φ = 191893582848.

The previous prime is 501540053437. The next prime is 501540053447. The reversal of 501540053440 is 44350045105.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501540053447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34064655 + ... + 34079374.

Almost surely, 2^501540053440 is an apocalyptic number.

It is an amenable number.

501540053440 is an abundant number, since it is smaller than the sum of its proper divisors (744677967200).

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

501540053440 is a wasteful number, since it uses less digits than its factorization.

501540053440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68144069 (or 68144059 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 501540053440 its reverse (44350045105), we get a palindrome (545890098545).

The spelling of 501540053440 in words is "five hundred one billion, five hundred forty million, fifty-three thousand, four hundred forty".