2100610640 has 40 divisors (see below), whose sum is σ = 4963995528. Its totient is φ = 826467840.

The previous prime is 2100610619. The next prime is 2100610667. The reversal of 2100610640 is 460160012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 65157184 + 2035453456 = 8072^2 + 45116^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210347 + ... + 220106.

Almost surely, 2^2100610640 is an apocalyptic number.

2100610640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100610640 is an abundant number, since it is smaller than the sum of its proper divisors (2863384888).

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

2100610640 is a wasteful number, since it uses less digits than its factorization.

2100610640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430527 (or 430521 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2100610640 is about 45832.4190939121. The cubic root of 2100610640 is about 1280.7032756350.

Adding to 2100610640 its reverse (460160012), we get a palindrome (2560770652).

The spelling of 2100610640 in words is "two billion, one hundred million, six hundred ten thousand, six hundred forty".