1266733637650 has 48 divisors (see below), whose sum is σ = 2647685162304. Its totient is φ = 447381506880.

The previous prime is 1266733637633. The next prime is 1266733637671. The reversal of 1266733637650 is 567363376621.

It is a super-2 number, since 2×1266733637650² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1266733637591 and 1266733637600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42350724 + ... + 42380623.

It is an arithmetic number, because the mean of its divisors is an integer number (55160107548).

Almost surely, 2^{1266733637650} is an apocalyptic number.

1266733637650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1266733637650 is an abundant number, since it is smaller than the sum of its proper divisors (1380951524654).

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

1266733637650 is a wasteful number, since it uses less digits than its factorization.

1266733637650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84731395 (or 84731390 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 55.

The spelling of 1266733637650 in words is "one trillion, two hundred sixty-six billion, seven hundred thirty-three million, six hundred thirty-seven thousand, six hundred fifty".