501605551660 has 12 divisors (see below), whose sum is σ = 1053371658528. Its totient is φ = 200642220656.

The previous prime is 501605551639. The next prime is 501605551673. The reversal of 501605551660 is 66155506105.

It is a super-2 number, since 2×501605551660² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12540138772 + ... + 12540138811.

It is an arithmetic number, because the mean of its divisors is an integer number (87780971544).

Almost surely, 2^501605551660 is an apocalyptic number.

It is an amenable number.

501605551660 is an abundant number, since it is smaller than the sum of its proper divisors (551766106868).

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

501605551660 is a wasteful number, since it uses less digits than its factorization.

501605551660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25080277592 (or 25080277590 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 501605551660 in words is "five hundred one billion, six hundred five million, five hundred fifty-one thousand, six hundred sixty".