2125906440 has 128 divisors (see below), whose sum is σ = 7717628160. Its totient is φ = 457334784.

The previous prime is 2125906427. The next prime is 2125906441. The reversal of 2125906440 is 446095212.

It is not an unprimeable number, because it can be changed into a prime (2125906441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60157 + ... + 88716.

It is an arithmetic number, because the mean of its divisors is an integer number (60293970).

Almost surely, 2^2125906440 is an apocalyptic number.

2125906440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2125906440 is an abundant number, since it is smaller than the sum of its proper divisors (5591721720).

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

2125906440 is a wasteful number, since it uses less digits than its factorization.

2125906440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148911 (or 148907 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 2125906440 is about 46107.5529604424. The cubic root of 2125906440 is about 1285.8235703226.

The spelling of 2125906440 in words is "two billion, one hundred twenty-five million, nine hundred six thousand, four hundred forty".