1264600655340 has 96 divisors (see below), whose sum is σ = 3864488673024. Its totient is φ = 306434261760.

The previous prime is 1264600655323. The next prime is 1264600655341. The reversal of 1264600655340 is 435560064621.

It is a junction number, because it is equal to n+sod(n) for n = 1264600655292 and 1264600655301.

It is not an unprimeable number, because it can be changed into a prime (1264600655341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1073622 + ... + 1918818.

It is an arithmetic number, because the mean of its divisors is an integer number (40255090344).

Almost surely, 2^{1264600655340} is an apocalyptic number.

1264600655340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264600655340 is an abundant number, since it is smaller than the sum of its proper divisors (2599888017684).

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

1264600655340 is a wasteful number, since it uses less digits than its factorization.

1264600655340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847487 (or 847485 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 1264600655340 in words is "one trillion, two hundred sixty-four billion, six hundred million, six hundred fifty-five thousand, three hundred forty".