2101010640 has 80 divisors (see below), whose sum is σ = 6517755456. Its totient is φ = 559872000.

The previous prime is 2101010621. The next prime is 2101010641. The reversal of 2101010640 is 460101012.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101010641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516615 + ... + 520665.

Almost surely, 2^2101010640 is an apocalyptic number.

2101010640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101010640 is an abundant number, since it is smaller than the sum of its proper divisors (4416744816).

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

2101010640 is a wasteful number, since it uses less digits than its factorization.

2101010640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6228 (or 6222 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2101010640 is about 45836.7826096030. The cubic root of 2101010640 is about 1280.7845613316.

Adding to 2101010640 its reverse (460101012), we get a palindrome (2561111652).

The spelling of 2101010640 in words is "two billion, one hundred one million, ten thousand, six hundred forty".