1171047653261 has 16 divisors (see below), whose sum is σ = 1192323761280. Its totient is φ = 1149885918720.

The previous prime is 1171047653239. The next prime is 1171047653287. The reversal of 1171047653261 is 1623567401711.

It is a cyclic number.

It is not a de Polignac number, because 1171047653261 - 2²⁶ = 1170980544397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171047653221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68710901 + ... + 68727941.

It is an arithmetic number, because the mean of its divisors is an integer number (74520235080).

Almost surely, 2^{1171047653261} is an apocalyptic number.

It is an amenable number.

1171047653261 is a deficient number, since it is larger than the sum of its proper divisors (21276108019).

1171047653261 is a wasteful number, since it uses less digits than its factorization.

1171047653261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20324.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 1171047653261 in words is "one trillion, one hundred seventy-one billion, forty-seven million, six hundred fifty-three thousand, two hundred sixty-one".