1161667929249 has 27 divisors (see below), whose sum is σ = 1685343706137. Its totient is φ = 771054505344.

The previous prime is 1161667929223. The next prime is 1161667929259. The reversal of 1161667929249 is 9429297661611.

The square root of 1161667929249 is 1077807.

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

1161667929249 is a `hidden beast` number, since 1 + 1 + 616 + 6 + 7 + 9 + 2 + 9 + 2 + 4 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 153933029649 + 1007734899600 = 392343^2 + 1003860^2 .

It is not a de Polignac number, because 1161667929249 - 2⁹ = 1161667928737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161667929259) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 895656969 + ... + 895658265.

Almost surely, 2^{1161667929249} is an apocalyptic number.

1161667929249 is the 1077807-th square number.

1161667929249 is the 538904-th centered octagonal number.

It is an amenable number.

1161667929249 is a deficient number, since it is larger than the sum of its proper divisors (523675776888).

1161667929249 is an frugal number, since it uses more digits than its factorization.

1161667929249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154 (or 1577 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

It can be divided in two parts, 1161667 and 929249, that added together give a square (2090916 = 1446²).

The spelling of 1161667929249 in words is "one trillion, one hundred sixty-one billion, six hundred sixty-seven million, nine hundred twenty-nine thousand, two hundred forty-nine".