12645771340 has 24 divisors (see below), whose sum is σ = 26702846352. Its totient is φ = 5030360640.

The previous prime is 12645771331. The next prime is 12645771371. The reversal of 12645771340 is 4317754621.

It is a junction number, because it is equal to n+sod(n) for n = 12645771293 and 12645771302.

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, 1743034 + ... + 1750273.

It is an arithmetic number, because the mean of its divisors is an integer number (1112618598).

Almost surely, 2^12645771340 is an apocalyptic number.

12645771340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12645771340 is an abundant number, since it is smaller than the sum of its proper divisors (14057075012).

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

12645771340 is a wasteful number, since it uses less digits than its factorization.

12645771340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493497 (or 3493495 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 12645771340 in words is "twelve billion, six hundred forty-five million, seven hundred seventy-one thousand, three hundred forty".