2640660262446 has 16 divisors (see below), whose sum is σ = 5360146205184. Its totient is φ = 867082474104.

The previous prime is 2640660262433. The next prime is 2640660262477. The reversal of 2640660262446 is 6442620660462.

It is a super-2 number, since 2×2640660262446² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2640660262395 and 2640660262404.

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, 3284402910 + ... + 3284403713.

It is an arithmetic number, because the mean of its divisors is an integer number (335009137824).

Almost surely, 2^{2640660262446} is an apocalyptic number.

2640660262446 is an abundant number, since it is smaller than the sum of its proper divisors (2719485942738).

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

2640660262446 is a wasteful number, since it uses less digits than its factorization.

2640660262446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6568806695.

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 2640660262446 in words is "two trillion, six hundred forty billion, six hundred sixty million, two hundred sixty-two thousand, four hundred forty-six".