501233402664 has 48 divisors (see below), whose sum is σ = 1374690782400. Its totient is φ = 164962890144.

The previous prime is 501233402639. The next prime is 501233402669. The reversal of 501233402664 is 466204332105.

501233402664 is a `hidden beast` number, since 50 + 1 + 2 + 3 + 340 + 266 + 4 = 666.

It is a super-2 number, since 2×501233402664² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (501233402669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44054914 + ... + 44066289.

It is an arithmetic number, because the mean of its divisors is an integer number (28639391300).

Almost surely, 2^501233402664 is an apocalyptic number.

It is an amenable number.

501233402664 is an abundant number, since it is smaller than the sum of its proper divisors (873457379736).

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

501233402664 is a wasteful number, since it uses less digits than its factorization.

501233402664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88121294 (or 88121287 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 501233402664 its reverse (466204332105), we get a palindrome (967437734769).

The spelling of 501233402664 in words is "five hundred one billion, two hundred thirty-three million, four hundred two thousand, six hundred sixty-four".