650640420432 has 120 divisors (see below), whose sum is σ = 1825656978600. Its totient is φ = 216313012224.

The previous prime is 650640420403. The next prime is 650640420433. The reversal of 650640420432 is 234024046056.

650640420432 is a `hidden beast` number, since 6 + 5 + 0 + 640 + 4 + 2 + 0 + 4 + 3 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 109232894016 + 541407526416 = 330504^2 + 735804^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650640420433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122000038 + ... + 122005370.

It is an arithmetic number, because the mean of its divisors is an integer number (15213808155).

Almost surely, 2^650640420432 is an apocalyptic number.

It is an amenable number.

650640420432 is an abundant number, since it is smaller than the sum of its proper divisors (1175016558168).

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

650640420432 is a wasteful number, since it uses less digits than its factorization.

650640420432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7405 (or 7396 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 650640420432 its reverse (234024046056), we get a palindrome (884664466488).

The spelling of 650640420432 in words is "six hundred fifty billion, six hundred forty million, four hundred twenty thousand, four hundred thirty-two".