2640247173 has 6 divisors (see below), whose sum is σ = 3813690374. Its totient is φ = 1760164776.

The previous prime is 2640247157. The next prime is 2640247217. The reversal of 2640247173 is 3717420462.

2640247173 is a `hidden beast` number, since 2 + 640 + 2 + 4 + 7 + 1 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1701315009 + 938932164 = 41247^2 + 30642^2 .

It is not a de Polignac number, because 2640247173 - 2⁴ = 2640247157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640246173) 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 5 ways as a sum of consecutive naturals, for example, 146680390 + ... + 146680407.

Almost surely, 2^2640247173 is an apocalyptic number.

It is an amenable number.

2640247173 is a deficient number, since it is larger than the sum of its proper divisors (1173443201).

2640247173 is a wasteful number, since it uses less digits than its factorization.

2640247173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293360803 (or 293360800 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 2640247173 is about 51383.3355573575. The cubic root of 2640247173 is about 1382.1277777380.

The spelling of 2640247173 in words is "two billion, six hundred forty million, two hundred forty-seven thousand, one hundred seventy-three".