2146620640 has 48 divisors (see below), whose sum is σ = 5075375760. Its totient is φ = 857973760.

The previous prime is 2146620611. The next prime is 2146620643. The reversal of 2146620640 is 460266412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2146620643) 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 7 ways as a sum of consecutive naturals, for example, 232431 + ... + 241489.

It is an arithmetic number, because the mean of its divisors is an integer number (105736995).

Almost surely, 2^2146620640 is an apocalyptic number.

2146620640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2146620640 is an abundant number, since it is smaller than the sum of its proper divisors (2928755120).

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

2146620640 is a wasteful number, since it uses less digits than its factorization.

2146620640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555 (or 10547 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 2146620640 is about 46331.6375708867. The cubic root of 2146620640 is about 1289.9863067673.

The spelling of 2146620640 in words is "two billion, one hundred forty-six million, six hundred twenty thousand, six hundred forty".