1266040137400 has 48 divisors (see below), whose sum is σ = 3006171923040. Its totient is φ = 495641241600.

The previous prime is 1266040137377. The next prime is 1266040137431. The reversal of 1266040137400 is 47310406621.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 67333161 + ... + 67351960.

It is an arithmetic number, because the mean of its divisors is an integer number (62628581730).

Almost surely, 2^{1266040137400} is an apocalyptic number.

1266040137400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266040137400 is an abundant number, since it is smaller than the sum of its proper divisors (1740131785640).

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

1266040137400 is a wasteful number, since it uses less digits than its factorization.

1266040137400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134685184 (or 134685175 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 1266040137400 in words is "one trillion, two hundred sixty-six billion, forty million, one hundred thirty-seven thousand, four hundred".