11667211644 has 24 divisors (see below), whose sum is σ = 29698357248. Its totient is φ = 3535518640.

The previous prime is 11667211643. The next prime is 11667211663. The reversal of 11667211644 is 44611276611.

It is a super-2 number, since 2×11667211644² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11667211643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44193852 + ... + 44194115.

It is an arithmetic number, because the mean of its divisors is an integer number (1237431552).

Almost surely, 2^11667211644 is an apocalyptic number.

It is an amenable number.

11667211644 is an abundant number, since it is smaller than the sum of its proper divisors (18031145604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11667211644 is a wasteful number, since it uses less digits than its factorization.

11667211644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88387985 (or 88387983 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The spelling of 11667211644 in words is "eleven billion, six hundred sixty-seven million, two hundred eleven thousand, six hundred forty-four".