2639780172 has 48 divisors (see below), whose sum is σ = 6847932000. Its totient is φ = 879405120.

The previous prime is 2639780159. The next prime is 2639780233. The reversal of 2639780172 is 2710879362.

2639780172 is a `hidden beast` number, since 2 + 639 + 7 + 8 + 0 + 1 + 7 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204222 + ... + 216762.

It is an arithmetic number, because the mean of its divisors is an integer number (142665250).

Almost surely, 2^2639780172 is an apocalyptic number.

It is an amenable number.

2639780172 is an abundant number, since it is smaller than the sum of its proper divisors (4208151828).

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

2639780172 is a wasteful number, since it uses less digits than its factorization.

2639780172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14503 (or 14495 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 2639780172 is about 51378.7910718032. The cubic root of 2639780172 is about 1382.0462837122.

The spelling of 2639780172 in words is "two billion, six hundred thirty-nine million, seven hundred eighty thousand, one hundred seventy-two".