2640556126 has 32 divisors (see below), whose sum is σ = 4373107200. Its totient is φ = 1188087264.

The previous prime is 2640556123. The next prime is 2640556133. The reversal of 2640556126 is 6216550462.

It is a super-2 number, since 2×2640556126² = 13945073309112255752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640556123) 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, 667711 + ... + 671653.

It is an arithmetic number, because the mean of its divisors is an integer number (136659600).

Almost surely, 2^2640556126 is an apocalyptic number.

2640556126 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2640556126 is a deficient number, since it is larger than the sum of its proper divisors (1732551074).

2640556126 is a wasteful number, since it uses less digits than its factorization.

2640556126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 2640556126 is about 51386.3418234846. The cubic root of 2640556126 is about 1382.1816863105.

The spelling of 2640556126 in words is "two billion, six hundred forty million, five hundred fifty-six thousand, one hundred twenty-six".