1540544155331 has 16 divisors (see below), whose sum is σ = 1598457520800. Its totient is φ = 1483723111680.

The previous prime is 1540544155273. The next prime is 1540544155357. The reversal of 1540544155331 is 1335514450451.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540544155331 is a prime.

It is a super-2 number, since 2×1540544155331² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (1540544152331) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 222221 + ... + 1769313.

It is an arithmetic number, because the mean of its divisors is an integer number (99903595050).

Almost surely, 2^{1540544155331} is an apocalyptic number.

1540544155331 is a deficient number, since it is larger than the sum of its proper divisors (57913365469).

1540544155331 is a wasteful number, since it uses less digits than its factorization.

1540544155331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547446.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 1540544155331 in words is "one trillion, five hundred forty billion, five hundred forty-four million, one hundred fifty-five thousand, three hundred thirty-one".