1264289168 has 10 divisors (see below), whose sum is σ = 2449560294. Its totient is φ = 632144576.

The previous prime is 1264289137. The next prime is 1264289177. The reversal of 1264289168 is 8619824621.

It can be written as a sum of positive squares in only one way, i.e., 1257979024 + 6310144 = 35468^2 + 2512^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39509021 + ... + 39509052.

Almost surely, 2^1264289168 is an apocalyptic number.

It is an amenable number.

1264289168 is a deficient number, since it is larger than the sum of its proper divisors (1185271126).

1264289168 is an equidigital number, since it uses as much as digits as its factorization.

1264289168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79018081 (or 79018075 counting only the distinct ones).

The product of its digits is 331776, while the sum is 47.

The square root of 1264289168 is about 35556.8441794263. The cubic root of 1264289168 is about 1081.3064801797.

The spelling of 1264289168 in words is "one billion, two hundred sixty-four million, two hundred eighty-nine thousand, one hundred sixty-eight".