2145639610 has 16 divisors (see below), whose sum is σ = 3867611400. Its totient is φ = 857042496.

The previous prime is 2145639577. The next prime is 2145639623. The reversal of 2145639610 is 169365412.

It can be written as a sum of positive squares in 4 ways, for example, as 1259327169 + 886312441 = 35487^2 + 29771^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2145639610.

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, 144225 + ... + 158404.

Almost surely, 2^2145639610 is an apocalyptic number.

2145639610 is a deficient number, since it is larger than the sum of its proper divisors (1721971790).

2145639610 is a wasteful number, since it uses less digits than its factorization.

2145639610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303345.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 2145639610 is about 46321.0493188572. The cubic root of 2145639610 is about 1289.7897640283.

The spelling of 2145639610 in words is "two billion, one hundred forty-five million, six hundred thirty-nine thousand, six hundred ten".