1264736616 has 64 divisors (see below), whose sum is σ = 3714621120. Its totient is φ = 353771520.

The previous prime is 1264736593. The next prime is 1264736617. The reversal of 1264736616 is 6166374621.

It is a super-2 number, since 2×1264736616² = 3199117415702262912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1264736617) 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, 180825 + ... + 187688.

It is an arithmetic number, because the mean of its divisors is an integer number (58040955).

Almost surely, 2^1264736616 is an apocalyptic number.

It is an amenable number.

1264736616 is an abundant number, since it is smaller than the sum of its proper divisors (2449884504).

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

1264736616 is a wasteful number, since it uses less digits than its factorization.

1264736616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368546 (or 368542 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The square root of 1264736616 is about 35563.1356322808. The cubic root of 1264736616 is about 1081.4340278346.

The spelling of 1264736616 in words is "one billion, two hundred sixty-four million, seven hundred thirty-six thousand, six hundred sixteen".