2640129272 has 16 divisors (see below), whose sum is σ = 5400264600. Its totient is φ = 1200058720.

The previous prime is 2640129241. The next prime is 2640129301. The reversal of 2640129272 is 2729210462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15000647 + ... + 15000822.

Almost surely, 2^2640129272 is an apocalyptic number.

2640129272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2640129272 is an abundant number, since it is smaller than the sum of its proper divisors (2760135328).

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

2640129272 is a wasteful number, since it uses less digits than its factorization.

2640129272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30001486 (or 30001482 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 2640129272 is about 51382.1882757050. The cubic root of 2640129272 is about 1382.1072043268.

The spelling of 2640129272 in words is "two billion, six hundred forty million, one hundred twenty-nine thousand, two hundred seventy-two".