1264201150689 has 9 divisors (see below), whose sum is σ = 1826073201043. Its totient is φ = 842798518392.

The previous prime is 1264201150661. The next prime is 1264201150699. The reversal of 1264201150689 is 9860511024621.

The square root of 1264201150689 is 1124367.

It is a perfect power (a square), and thus also a powerful number.

1264201150689 is a `hidden beast` number, since 1 + 2 + 64 + 2 + 0 + 1 + 1 + 506 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 100003310289 + 1164197840400 = 316233^2 + 1078980^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1264201150689 - 2⁵ = 1264201150657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264201150699) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3185707 + ... + 3560495.

Almost surely, 2^{1264201150689} is an apocalyptic number.

1264201150689 is the 1124367-th square number.

1264201150689 is the 562184-th centered octagonal number.

It is an amenable number.

1264201150689 is a deficient number, since it is larger than the sum of its proper divisors (561872050354).

1264201150689 is an frugal number, since it uses more digits than its factorization.

1264201150689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749584 (or 374792 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 1264201150689 in words is "one trillion, two hundred sixty-four billion, two hundred one million, one hundred fifty thousand, six hundred eighty-nine".