1176721664 has 18 divisors (see below), whose sum is σ = 2348847270. Its totient is φ = 588360704.

The previous prime is 1176721643. The next prime is 1176721687. The reversal of 1176721664 is 4661276711.

It can be written as a sum of positive squares in only one way, i.e., 795691264 + 381030400 = 28208^2 + 19520^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2298029 + ... + 2298540.

It is an arithmetic number, because the mean of its divisors is an integer number (130491515).

Almost surely, 2^1176721664 is an apocalyptic number.

It is an amenable number.

1176721664 is a deficient number, since it is larger than the sum of its proper divisors (1172125606).

1176721664 is an frugal number, since it uses more digits than its factorization.

1176721664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4596585 (or 4596571 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 1176721664 is about 34303.3768600119. The cubic root of 1176721664 is about 1055.7422848297.

The spelling of 1176721664 in words is "one billion, one hundred seventy-six million, seven hundred twenty-one thousand, six hundred sixty-four".