1264767616 has 48 divisors (see below), whose sum is σ = 2931040890. Its totient is φ = 542040576.

The previous prime is 1264767613. The next prime is 1264767619. The reversal of 1264767616 is 6167674621.

It is an interprime number because it is at equal distance from previous prime (1264767613) and next prime (1264767619).

It can be written as a sum of positive squares in only one way, i.e., 1264513600 + 254016 = 35560^2 + 504^2 .

It is not an unprimeable number, because it can be changed into a prime (1264767611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94555 + ... + 107098.

Almost surely, 2^1264767616 is an apocalyptic number.

1264767616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1264767616 is an abundant number, since it is smaller than the sum of its proper divisors (1666273274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1264767616 is an equidigital number, since it uses as much as digits as its factorization.

1264767616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201681 (or 201662 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The square root of 1264767616 is about 35563.5714741925. The cubic root of 1264767616 is about 1081.4428634506.

The spelling of 1264767616 in words is "one billion, two hundred sixty-four million, seven hundred sixty-seven thousand, six hundred sixteen".