2640129776 has 20 divisors (see below), whose sum is σ = 5199109944. Its totient is φ = 1298424000.

The previous prime is 2640129763. The next prime is 2640129803. The reversal of 2640129776 is 6779210462.

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, 1351550 + ... + 1353501.

Almost surely, 2^2640129776 is an apocalyptic number.

It is an amenable number.

2640129776 is a deficient number, since it is larger than the sum of its proper divisors (2558980168).

2640129776 is a wasteful number, since it uses less digits than its factorization.

2640129776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705120 (or 2705114 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 2640129776 is about 51382.1931801281. The cubic root of 2640129776 is about 1382.1072922747.

The spelling of 2640129776 in words is "two billion, six hundred forty million, one hundred twenty-nine thousand, seven hundred seventy-six".