12640600550 has 12 divisors (see below), whose sum is σ = 23511517116. Its totient is φ = 5056240200.

The previous prime is 12640600547. The next prime is 12640600589. The reversal of 12640600550 is 5500604621.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126405956 + ... + 126406055.

It is an arithmetic number, because the mean of its divisors is an integer number (1959293093).

Almost surely, 2^12640600550 is an apocalyptic number.

12640600550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12640600550 is a deficient number, since it is larger than the sum of its proper divisors (10870916566).

12640600550 is a wasteful number, since it uses less digits than its factorization.

12640600550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252812023 (or 252812018 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 12640600550 in words is "twelve billion, six hundred forty million, six hundred thousand, five hundred fifty".