1156561007444 has 12 divisors (see below), whose sum is σ = 2024038879968. Its totient is φ = 578264184600.

The previous prime is 1156561007417. The next prime is 1156561007491. The reversal of 1156561007444 is 4447001656511.

It is a junction number, because it is equal to n+sod(n) for n = 1156561007395 and 1156561007404.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3919622 + ... + 4204349.

It is an arithmetic number, because the mean of its divisors is an integer number (168669906664).

Almost surely, 2^{1156561007444} is an apocalyptic number.

It is an amenable number.

1156561007444 is a deficient number, since it is larger than the sum of its proper divisors (867477872524).

1156561007444 is a wasteful number, since it uses less digits than its factorization.

1156561007444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8159566 (or 8159564 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 1156561007444 in words is "one trillion, one hundred fifty-six billion, five hundred sixty-one million, seven thousand, four hundred forty-four".