1311045240156 has 24 divisors (see below), whose sum is σ = 3059663639424. Its totient is φ = 436935354480.

The previous prime is 1311045240049. The next prime is 1311045240157. The reversal of 1311045240156 is 6510425401131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311045240157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9897160 + ... + 10028751.

It is an arithmetic number, because the mean of its divisors is an integer number (127485984976).

Almost surely, 2^{1311045240156} is an apocalyptic number.

It is an amenable number.

1311045240156 is an abundant number, since it is smaller than the sum of its proper divisors (1748618399268).

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

1311045240156 is a wasteful number, since it uses less digits than its factorization.

1311045240156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19931401 (or 19931399 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 1311045240156 in words is "one trillion, three hundred eleven billion, forty-five million, two hundred forty thousand, one hundred fifty-six".