501661235460 has 192 divisors, whose sum is σ = 1752755687424. Its totient is φ = 104151897600.

The previous prime is 501661235441. The next prime is 501661235473. The reversal of 501661235460 is 64532166105.

It is a super-2 number, since 2×501661235460² (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 63 ways as a sum of consecutive naturals, for example, 5410249 + ... + 5502191.

It is an arithmetic number, because the mean of its divisors is an integer number (9128935872).

Almost surely, 2^501661235460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501661235460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (876377843712).

501661235460 is an abundant number, since it is smaller than the sum of its proper divisors (1251094451964).

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

501661235460 is a wasteful number, since it uses less digits than its factorization.

501661235460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93154 (or 93152 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 501661235460 in words is "five hundred one billion, six hundred sixty-one million, two hundred thirty-five thousand, four hundred sixty".