1266539001402 has 8 divisors (see below), whose sum is σ = 2533078002816. Its totient is φ = 422179667132.

The previous prime is 1266539001397. The next prime is 1266539001479. The reversal of 1266539001402 is 2041009356621.

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

1266539001402 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105544916778 + ... + 105544916789.

It is an arithmetic number, because the mean of its divisors is an integer number (316634750352).

Almost surely, 2^{1266539001402} is an apocalyptic number.

1266539001402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1266539001402 is a wasteful number, since it uses less digits than its factorization.

1266539001402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211089833572.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 1266539001402 in words is "one trillion, two hundred sixty-six billion, five hundred thirty-nine million, one thousand, four hundred two".