1265164157288 has 8 divisors (see below), whose sum is σ = 2372182794930. Its totient is φ = 632582078640.

The previous prime is 1265164157267. The next prime is 1265164157321. The reversal of 1265164157288 is 8827514615621.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1187223801604 + 77940355684 = 1089598^2 + 279178^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79072759823 + ... + 79072759838.

Almost surely, 2^{1265164157288} is an apocalyptic number.

It is an amenable number.

1265164157288 is a deficient number, since it is larger than the sum of its proper divisors (1107018637642).

1265164157288 is a wasteful number, since it uses less digits than its factorization.

1265164157288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158145519667 (or 158145519663 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 56.

The spelling of 1265164157288 in words is "one trillion, two hundred sixty-five billion, one hundred sixty-four million, one hundred fifty-seven thousand, two hundred eighty-eight".