1171561057125 has 32 divisors (see below), whose sum is σ = 1949605856640. Its totient is φ = 624791456000.

The previous prime is 1171561057123. The next prime is 1171561057153. The reversal of 1171561057125 is 5217501651711.

It is not a de Polignac number, because 1171561057125 - 2¹ = 1171561057123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171561057123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6103870 + ... + 6292880.

It is an arithmetic number, because the mean of its divisors is an integer number (60925183020).

Almost surely, 2^{1171561057125} is an apocalyptic number.

1171561057125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1171561057125 is a deficient number, since it is larger than the sum of its proper divisors (778044799515).

1171561057125 is a wasteful number, since it uses less digits than its factorization.

1171561057125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205558 (or 205548 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 42.

The spelling of 1171561057125 in words is "one trillion, one hundred seventy-one billion, five hundred sixty-one million, fifty-seven thousand, one hundred twenty-five".