1161958921472 has 72 divisors (see below), whose sum is σ = 2359230830880. Its totient is φ = 571001518080.

The previous prime is 1161958921411. The next prime is 1161958921589. The reversal of 1161958921472 is 2741298591611.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120268322 + ... + 120277982.

Almost surely, 2^{1161958921472} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161958921472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1179615415440).

1161958921472 is an abundant number, since it is smaller than the sum of its proper divisors (1197271909408).

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

1161958921472 is an frugal number, since it uses more digits than its factorization.

1161958921472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17699 (or 17685 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 56.

The spelling of 1161958921472 in words is "one trillion, one hundred sixty-one billion, nine hundred fifty-eight million, nine hundred twenty-one thousand, four hundred seventy-two".