1156105388787 has 16 divisors (see below), whose sum is σ = 1558126186752. Its totient is φ = 762454012320.

The previous prime is 1156105388783. The next prime is 1156105388791. The reversal of 1156105388787 is 7878835016511.

It is an interprime number because it is at equal distance from previous prime (1156105388783) and next prime (1156105388791).

It is not a de Polignac number, because 1156105388787 - 2² = 1156105388783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1156105388787.

It is not an unprimeable number, because it can be changed into a prime (1156105388783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5299639 + ... + 5513472.

It is an arithmetic number, because the mean of its divisors is an integer number (97382886672).

Almost surely, 2^{1156105388787} is an apocalyptic number.

1156105388787 is a deficient number, since it is larger than the sum of its proper divisors (402020797965).

1156105388787 is a wasteful number, since it uses less digits than its factorization.

1156105388787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10813498.

The product of its (nonzero) digits is 11289600, while the sum is 60.

The spelling of 1156105388787 in words is "one trillion, one hundred fifty-six billion, one hundred five million, three hundred eighty-eight thousand, seven hundred eighty-seven".