1181622664 has 8 divisors (see below), whose sum is σ = 2215542510. Its totient is φ = 590811328.

The previous prime is 1181622647. The next prime is 1181622679. The reversal of 1181622664 is 4662261811.

It can be written as a sum of positive squares in only one way, i.e., 1163492100 + 18130564 = 34110^2 + 4258^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73851409 + ... + 73851424.

Almost surely, 2^1181622664 is an apocalyptic number.

It is an amenable number.

1181622664 is a deficient number, since it is larger than the sum of its proper divisors (1033919846).

1181622664 is a wasteful number, since it uses less digits than its factorization.

1181622664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147702839 (or 147702835 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 1181622664 is about 34374.7387480981. The cubic root of 1181622664 is about 1057.2059631812.

The spelling of 1181622664 in words is "one billion, one hundred eighty-one million, six hundred twenty-two thousand, six hundred sixty-four".