1266287980138 has 8 divisors (see below), whose sum is σ = 1900275793920. Its totient is φ = 632862715500.

The previous prime is 1266287980117. The next prime is 1266287980157. The reversal of 1266287980138 is 8310897826621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140631658 + ... + 140640661.

It is an arithmetic number, because the mean of its divisors is an integer number (237534474240).

Almost surely, 2^{1266287980138} is an apocalyptic number.

1266287980138 is a deficient number, since it is larger than the sum of its proper divisors (633987813782).

1266287980138 is a wasteful number, since it uses less digits than its factorization.

1266287980138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281274572.

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 1266287980138 in words is "one trillion, two hundred sixty-six billion, two hundred eighty-seven million, nine hundred eighty thousand, one hundred thirty-eight".