2639940266408 has 32 divisors (see below), whose sum is σ = 4956857875200. Its totient is φ = 1318111875072.

The previous prime is 2639940266377. The next prime is 2639940266477. The reversal of 2639940266408 is 8046620499362.

It is a happy number.

It is a super-2 number, since 2×2639940266408² (a number of 26 digits) contains 22 as substring.

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, 79387241 + ... + 79420487.

It is an arithmetic number, because the mean of its divisors is an integer number (154901808600).

Almost surely, 2^{2639940266408} is an apocalyptic number.

It is an amenable number.

2639940266408 is a deficient number, since it is larger than the sum of its proper divisors (2316917608792).

2639940266408 is a wasteful number, since it uses less digits than its factorization.

2639940266408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46929 (or 46925 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 59.

The spelling of 2639940266408 in words is "two trillion, six hundred thirty-nine billion, nine hundred forty million, two hundred sixty-six thousand, four hundred eight".