1161549373504 has 189 divisors, whose sum is σ = 2565932807799. Its totient is φ = 521459527680.

The previous prime is 1161549373483. The next prime is 1161549373519. The reversal of 1161549373504 is 4053739451611.

The square root of 1161549373504 is 1077752.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 18463374400 + 1143085999104 = 135880^2 + 1069152^2 .

It is a Duffinian 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 26 ways as a sum of consecutive naturals, for example, 4819706824 + ... + 4819707064.

Almost surely, 2^{1161549373504} is an apocalyptic number.

1161549373504 is the 1077752-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161549373504

1161549373504 is an abundant number, since it is smaller than the sum of its proper divisors (1404383434295).

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

1161549373504 is an frugal number, since it uses more digits than its factorization.

1161549373504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 49.

Multiplying 1161549373504 by its sum of digits (49), we get a square (56915919301696 = 7544264²).

The spelling of 1161549373504 in words is "one trillion, one hundred sixty-one billion, five hundred forty-nine million, three hundred seventy-three thousand, five hundred four".