1375561266 has 16 divisors (see below), whose sum is σ = 2766324288. Its totient is φ = 455986800.

The previous prime is 1375561261. The next prime is 1375561277. The reversal of 1375561266 is 6621655731.

It is not an unprimeable number, because it can be changed into a prime (1375561261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632230 + ... + 634401.

It is an arithmetic number, because the mean of its divisors is an integer number (172895268).

Almost surely, 2^1375561266 is an apocalyptic number.

1375561266 is an abundant number, since it is smaller than the sum of its proper divisors (1390763022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1375561266 is a wasteful number, since it uses less digits than its factorization.

1375561266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266817.

The product of its digits is 226800, while the sum is 42.

The square root of 1375561266 is about 37088.5597725228. The cubic root of 1375561266 is about 1112.1413270551.

The spelling of 1375561266 in words is "one billion, three hundred seventy-five million, five hundred sixty-one thousand, two hundred sixty-six".