2125643601 has 16 divisors (see below), whose sum is σ = 3113072640. Its totient is φ = 1284140880.

The previous prime is 2125643587. The next prime is 2125643609. The reversal of 2125643601 is 1063465212.

It is not a de Polignac number, because 2125643601 - 2⁷ = 2125643473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2125643609) 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, 809385 + ... + 812006.

It is an arithmetic number, because the mean of its divisors is an integer number (194567040).

Almost surely, 2^2125643601 is an apocalyptic number.

It is an amenable number.

2125643601 is a deficient number, since it is larger than the sum of its proper divisors (987429039).

2125643601 is a wasteful number, since it uses less digits than its factorization.

2125643601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621436.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2125643601 is about 46104.7025909505. The cubic root of 2125643601 is about 1285.7705766906.

The spelling of 2125643601 in words is "two billion, one hundred twenty-five million, six hundred forty-three thousand, six hundred one".