11451140211661 has 12 divisors (see below), whose sum is σ = 11937159729756. Its totient is φ = 10983679916160.

The previous prime is 11451140211649. The next prime is 11451140211701. The reversal of 11451140211661 is 16611204115411.

It can be written as a sum of positive squares in 2 ways, for example, as 2950527644100 + 8500612567561 = 1717710^2 + 2915581^2 .

It is not a de Polignac number, because 11451140211661 - 2¹⁹ = 11451139687373 is a prime.

It is a super-2 number, since 2×11451140211661² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11451140211361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52616446 + ... + 52833631.

It is an arithmetic number, because the mean of its divisors is an integer number (994763310813).

Almost surely, 2^{11451140211661} is an apocalyptic number.

It is an amenable number.

11451140211661 is a deficient number, since it is larger than the sum of its proper divisors (486019518095).

11451140211661 is a wasteful number, since it uses less digits than its factorization.

11451140211661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105450252 (or 105450221 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 34.

The spelling of 11451140211661 in words is "eleven trillion, four hundred fifty-one billion, one hundred forty million, two hundred eleven thousand, six hundred sixty-one".