1264051989269 has 4 divisors (see below), whose sum is σ = 1275648796620. Its totient is φ = 1252455181920.

The previous prime is 1264051989257. The next prime is 1264051989271. The reversal of 1264051989269 is 9629891504621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 986863428100 + 277188561169 = 993410^2 + 526487^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264051989269 - 2⁴ = 1264051989253 is a prime.

It is a super-2 number, since 2×1264051989269² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264051989229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5798403512 + ... + 5798403729.

It is an arithmetic number, because the mean of its divisors is an integer number (318912199155).

Almost surely, 2^{1264051989269} is an apocalyptic number.

It is an amenable number.

1264051989269 is a deficient number, since it is larger than the sum of its proper divisors (11596807351).

1264051989269 is a wasteful number, since it uses less digits than its factorization.

1264051989269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11596807350.

The product of its (nonzero) digits is 16796160, while the sum is 62.

The spelling of 1264051989269 in words is "one trillion, two hundred sixty-four billion, fifty-one million, nine hundred eighty-nine thousand, two hundred sixty-nine".