2656940140 has 48 divisors (see below), whose sum is σ = 5652491040. Its totient is φ = 1048931840.

The previous prime is 2656940131. The next prime is 2656940147. The reversal of 2656940140 is 410496562.

It is a self number, because there is not a number n which added to its sum of digits gives 2656940140.

It is not an unprimeable number, because it can be changed into a prime (2656940147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1374975 + ... + 1376905.

It is an arithmetic number, because the mean of its divisors is an integer number (117760230).

Almost surely, 2^2656940140 is an apocalyptic number.

2656940140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2656940140 is an abundant number, since it is smaller than the sum of its proper divisors (2995550900).

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

2656940140 is a wasteful number, since it uses less digits than its factorization.

2656940140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802 (or 2800 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 2656940140 is about 51545.5152268362. The cubic root of 2656940140 is about 1385.0344954417.

The spelling of 2656940140 in words is "two billion, six hundred fifty-six million, nine hundred forty thousand, one hundred forty".