1264561516 has 6 divisors (see below), whose sum is σ = 2212982660. Its totient is φ = 632280756.

The previous prime is 1264561513. The next prime is 1264561603. The reversal of 1264561516 is 6151654621.

It is not an unprimeable number, because it can be changed into a prime (1264561513) by changing a digit.

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 as a sum of consecutive naturals, namely, 158070186 + ... + 158070193.

Almost surely, 2^1264561516 is an apocalyptic number.

It is an amenable number.

1264561516 is a deficient number, since it is larger than the sum of its proper divisors (948421144).

1264561516 is a wasteful number, since it uses less digits than its factorization.

1264561516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316140383 (or 316140381 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 1264561516 is about 35560.6737281509. The cubic root of 1264561516 is about 1081.3841181445.

The spelling of 1264561516 in words is "one billion, two hundred sixty-four million, five hundred sixty-one thousand, five hundred sixteen".