1266136552 has 16 divisors (see below), whose sum is σ = 2388224160. Its totient is φ = 629276784.

The previous prime is 1266136541. The next prime is 1266136577. The reversal of 1266136552 is 2556316621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472518 + ... + 475189.

It is an arithmetic number, because the mean of its divisors is an integer number (149264010).

Almost surely, 2^1266136552 is an apocalyptic number.

It is an amenable number.

1266136552 is a deficient number, since it is larger than the sum of its proper divisors (1122087608).

1266136552 is a wasteful number, since it uses less digits than its factorization.

1266136552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947880 (or 947876 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 1266136552 is about 35582.8125925987. The cubic root of 1266136552 is about 1081.8328935375.

The spelling of 1266136552 in words is "one billion, two hundred sixty-six million, one hundred thirty-six thousand, five hundred fifty-two".