1161255561698 has 8 divisors (see below), whose sum is σ = 1742454648300. Its totient is φ = 580437345600.

The previous prime is 1161255561691. The next prime is 1161255561707. The reversal of 1161255561698 is 8961655521611.

It can be written as a sum of positive squares in 2 ways, for example, as 1158342045169 + 2913516529 = 1076263^2 + 53977^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1161255561691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95210003 + ... + 95222198.

Almost surely, 2^{1161255561698} is an apocalyptic number.

1161255561698 is a deficient number, since it is larger than the sum of its proper divisors (581199086602).

1161255561698 is a wasteful number, since it uses less digits than its factorization.

1161255561698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190435252.

The product of its digits is 3888000, while the sum is 56.

The spelling of 1161255561698 in words is "one trillion, one hundred sixty-one billion, two hundred fifty-five million, five hundred sixty-one thousand, six hundred ninety-eight".