1162491519721 has 9 divisors (see below), whose sum is σ = 1352294833149. Its totient is φ = 996414833484.

The previous prime is 1162491519701. The next prime is 1162491519731. The reversal of 1162491519721 is 1279151942611.

It is a happy number.

The square root of 1162491519721 is 1078189.

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

It is not a de Polignac number, because 1162491519721 - 2¹¹ = 1162491517673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1162491519701) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7470310 + ... + 7624336.

It is an arithmetic number, because the mean of its divisors is an integer number (150254981461).

Almost surely, 2^{1162491519721} is an apocalyptic number.

1162491519721 is the 1078189-th square number.

1162491519721 is the 539095-th centered octagonal number.

It is an amenable number.

1162491519721 is a deficient number, since it is larger than the sum of its proper divisors (189803313428).

1162491519721 is an frugal number, since it uses more digits than its factorization.

1162491519721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308068 (or 154034 counting only the distinct ones).

The product of its digits is 272160, while the sum is 49.

Multiplying 1162491519721 by its sum of digits (49), we get a square (56962084466329 = 7547323²).

1162491519721 divided by its sum of digits (49) gives a square (23724316729 = 154027²).

The spelling of 1162491519721 in words is "one trillion, one hundred sixty-two billion, four hundred ninety-one million, five hundred nineteen thousand, seven hundred twenty-one".