650508243861 has 16 divisors (see below), whose sum is σ = 991272528000. Its totient is φ = 371710795008.

The previous prime is 650508243859. The next prime is 650508243881. The reversal of 650508243861 is 168342805056.

It is a happy number.

It is not a de Polignac number, because 650508243861 - 2¹ = 650508243859 is a prime.

It is a super-2 number, since 2×650508243861² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 650508243861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650508243881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 707665 + ... + 1342313.

It is an arithmetic number, because the mean of its divisors is an integer number (61954533000).

Almost surely, 2^650508243861 is an apocalyptic number.

It is an amenable number.

650508243861 is a deficient number, since it is larger than the sum of its proper divisors (340764284139).

650508243861 is a wasteful number, since it uses less digits than its factorization.

650508243861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683468.

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 650508243861 in words is "six hundred fifty billion, five hundred eight million, two hundred forty-three thousand, eight hundred sixty-one".