503040651240 has 64 divisors (see below), whose sum is σ = 1510100553600. Its totient is φ = 134057187072.

The previous prime is 503040651089. The next prime is 503040651241. The reversal of 503040651240 is 42156040305.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 503040651198 and 503040651207.

It is not an unprimeable number, because it can be changed into a prime (503040651241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1173235 + ... + 1543554.

It is an arithmetic number, because the mean of its divisors is an integer number (23595321150).

Almost surely, 2^503040651240 is an apocalyptic number.

It is an amenable number.

503040651240 is an abundant number, since it is smaller than the sum of its proper divisors (1007059902360).

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

503040651240 is a wasteful number, since it uses less digits than its factorization.

503040651240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718346 (or 2718342 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 503040651240 its reverse (42156040305), we get a palindrome (545196691545).

The spelling of 503040651240 in words is "five hundred three billion, forty million, six hundred fifty-one thousand, two hundred forty".