1276618064 has 10 divisors (see below), whose sum is σ = 2473447530. Its totient is φ = 638309024.

The previous prime is 1276618039. The next prime is 1276618069. The reversal of 1276618064 is 4608166721.

It can be written as a sum of positive squares in only one way, i.e., 831745600 + 444872464 = 28840^2 + 21092^2 .

It is a super-2 number, since 2×1276618064² = 3259507362662216192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276618069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39894299 + ... + 39894330.

It is an arithmetic number, because the mean of its divisors is an integer number (247344753).

Almost surely, 2^1276618064 is an apocalyptic number.

It is an amenable number.

1276618064 is a deficient number, since it is larger than the sum of its proper divisors (1196829466).

1276618064 is an equidigital number, since it uses as much as digits as its factorization.

1276618064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79788637 (or 79788631 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 1276618064 is about 35729.7923867464. The cubic root of 1276618064 is about 1084.8099546094.

The spelling of 1276618064 in words is "one billion, two hundred seventy-six million, six hundred eighteen thousand, sixty-four".