2526661640 has 32 divisors (see below), whose sum is σ = 5686778880. Its totient is φ = 1010346432.

The previous prime is 2526661637. The next prime is 2526661691. The reversal of 2526661640 is 461666252.

It is a junction number, because it is equal to n+sod(n) for n = 2526661594 and 2526661603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150719 + ... + 166641.

It is an arithmetic number, because the mean of its divisors is an integer number (177711840).

Almost surely, 2^2526661640 is an apocalyptic number.

2526661640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2526661640 is an abundant number, since it is smaller than the sum of its proper divisors (3160117240).

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

2526661640 is a wasteful number, since it uses less digits than its factorization.

2526661640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19901 (or 19897 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 2526661640 is about 50265.9093223230. The cubic root of 2526661640 is about 1362.0164795535.

The spelling of 2526661640 in words is "two billion, five hundred twenty-six million, six hundred sixty-one thousand, six hundred forty".