1640254122 has 48 divisors (see below), whose sum is σ = 3830423688. Its totient is φ = 504276480.

The previous prime is 1640254093. The next prime is 1640254139. The reversal of 1640254122 is 2214520461.

1640254122 is a `hidden beast` number, since 1 + 640 + 2 + 5 + 4 + 12 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 976625001 + 663629121 = 31251^2 + 25761^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 400678 + ... + 404750.

Almost surely, 2^1640254122 is an apocalyptic number.

1640254122 is an abundant number, since it is smaller than the sum of its proper divisors (2190169566).

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

1640254122 is a wasteful number, since it uses less digits than its factorization.

1640254122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5815 (or 5812 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1640254122 is about 40500.0508888569. The cubic root of 1640254122 is about 1179.3346152940.

Adding to 1640254122 its reverse (2214520461), we get a palindrome (3854774583).

The spelling of 1640254122 in words is "one billion, six hundred forty million, two hundred fifty-four thousand, one hundred twenty-two".