501455342440 has 32 divisors (see below), whose sum is σ = 1215064869480. Its totient is φ = 185152741632.

The previous prime is 501455342419. The next prime is 501455342473. The reversal of 501455342440 is 44243554105.

It can be written as a sum of positive squares in 4 ways, for example, as 173270722564 + 328184619876 = 416258^2 + 572874^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 501455342440.

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, 482168079 + ... + 482169118.

Almost surely, 2^501455342440 is an apocalyptic number.

It is an amenable number.

501455342440 is an abundant number, since it is smaller than the sum of its proper divisors (713609527040).

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

501455342440 is a wasteful number, since it uses less digits than its factorization.

501455342440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964337221 (or 964337217 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 501455342440 its reverse (44243554105), we get a palindrome (545698896545).

The spelling of 501455342440 in words is "five hundred one billion, four hundred fifty-five million, three hundred forty-two thousand, four hundred forty".