1264277663 has 16 divisors (see below), whose sum is σ = 1411603200. Its totient is φ = 1122665280.

The previous prime is 1264277659. The next prime is 1264277669. The reversal of 1264277663 is 3667724621.

It is not a de Polignac number, because 1264277663 - 2² = 1264277659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264277669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73478 + ... + 89036.

It is an arithmetic number, because the mean of its divisors is an integer number (88225200).

Almost surely, 2^1264277663 is an apocalyptic number.

1264277663 is a deficient number, since it is larger than the sum of its proper divisors (147325537).

1264277663 is a wasteful number, since it uses less digits than its factorization.

1264277663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15742.

The product of its digits is 508032, while the sum is 44.

The square root of 1264277663 is about 35556.6823958592. The cubic root of 1264277663 is about 1081.3032002157.

The spelling of 1264277663 in words is "one billion, two hundred sixty-four million, two hundred seventy-seven thousand, six hundred sixty-three".