1161111664 has 40 divisors (see below), whose sum is σ = 2285250560. Its totient is φ = 571416768.

The previous prime is 1161111661. The next prime is 1161111673. The reversal of 1161111664 is 4661111611.

It is a happy number.

It is a super-3 number, since 3×1161111664³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161111661) 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, 462637 + ... + 465139.

It is an arithmetic number, because the mean of its divisors is an integer number (57131264).

Almost surely, 2^1161111664 is an apocalyptic number.

It is an amenable number.

1161111664 is a deficient number, since it is larger than the sum of its proper divisors (1124138896).

1161111664 is a wasteful number, since it uses less digits than its factorization.

1161111664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957 (or 2951 counting only the distinct ones).

The product of its digits is 864, while the sum is 28.

The square root of 1161111664 is about 34075.0886132377. The cubic root of 1161111664 is about 1051.0531124226.

The spelling of 1161111664 in words is "one billion, one hundred sixty-one million, one hundred eleven thousand, six hundred sixty-four".