206431651024 has 10 divisors (see below), whose sum is σ = 399961323890. Its totient is φ = 103215825504.

The previous prime is 206431651021. The next prime is 206431651043. The reversal of 206431651024 is 420156134602.

It can be written as a sum of positive squares in only one way, i.e., 108812897424 + 97618753600 = 329868^2 + 312440^2 .

It is a super-2 number, since 2×206431651024² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206431651021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6450989079 + ... + 6450989110.

It is an arithmetic number, because the mean of its divisors is an integer number (39996132389).

Almost surely, 2^206431651024 is an apocalyptic number.

It is an amenable number.

206431651024 is a deficient number, since it is larger than the sum of its proper divisors (193529672866).

206431651024 is a wasteful number, since it uses less digits than its factorization.

206431651024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12901978197 (or 12901978191 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 206431651024 its reverse (420156134602), we get a palindrome (626587785626).

The spelling of 206431651024 in words is "two hundred six billion, four hundred thirty-one million, six hundred fifty-one thousand, twenty-four".