2725216640 has 64 divisors (see below), whose sum is σ = 6798267360. Its totient is φ = 1042685952.

The previous prime is 2725216621. The next prime is 2725216661. The reversal of 2725216640 is 466125272.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 2725216640.

It is a congruent number.

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, 77849 + ... + 107288.

Almost surely, 2^2725216640 is an apocalyptic number.

2725216640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2725216640 is an abundant number, since it is smaller than the sum of its proper divisors (4073050720).

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

2725216640 is a wasteful number, since it uses less digits than its factorization.

2725216640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185179 (or 185167 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 2725216640 is about 52203.6075381769. The cubic root of 2725216640 is about 1396.7982342425.

The spelling of 2725216640 in words is "two billion, seven hundred twenty-five million, two hundred sixteen thousand, six hundred forty".