1264671916 has 12 divisors (see below), whose sum is σ = 2213453088. Its totient is φ = 632256752.

The previous prime is 1264671899. The next prime is 1264671923. The reversal of 1264671916 is 6191764621.

It is a super-2 number, since 2×1264671916² = 3198790110238222112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30090 + ... + 58606.

It is an arithmetic number, because the mean of its divisors is an integer number (184454424).

Almost surely, 2^1264671916 is an apocalyptic number.

It is an amenable number.

1264671916 is a deficient number, since it is larger than the sum of its proper divisors (948781172).

1264671916 is a wasteful number, since it uses less digits than its factorization.

1264671916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39608 (or 39606 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 1264671916 is about 35562.2259708247. The cubic root of 1264671916 is about 1081.4155865840.

The spelling of 1264671916 in words is "one billion, two hundred sixty-four million, six hundred seventy-one thousand, nine hundred sixteen".