1265208768 has 56 divisors (see below), whose sum is σ = 3719484560. Its totient is φ = 421735680.

The previous prime is 1265208761. The next prime is 1265208787. The reversal of 1265208768 is 8678025621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265208761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364363 + ... + 367818.

Almost surely, 2^1265208768 is an apocalyptic number.

1265208768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1265208768 is an abundant number, since it is smaller than the sum of its proper divisors (2454275792).

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

1265208768 is an equidigital number, since it uses as much as digits as its factorization.

1265208768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732202 (or 732186 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 1265208768 is about 35569.7732351501. The cubic root of 1265208768 is about 1081.5685848922.

The spelling of 1265208768 in words is "one billion, two hundred sixty-five million, two hundred eight thousand, seven hundred sixty-eight".