1275357664 has 48 divisors (see below), whose sum is σ = 2910007296. Its totient is φ = 538876800.

The previous prime is 1275357623. The next prime is 1275357667. The reversal of 1275357664 is 4667535721.

It is a super-2 number, since 2×1275357664² = 3253074342247073792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275357667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24192 + ... + 55999.

It is an arithmetic number, because the mean of its divisors is an integer number (60625152).

Almost surely, 2^1275357664 is an apocalyptic number.

1275357664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1275357664 is an abundant number, since it is smaller than the sum of its proper divisors (1634649632).

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

1275357664 is an equidigital number, since it uses as much as digits as its factorization.

1275357664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80279 (or 80271 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 46.

The square root of 1275357664 is about 35712.1500892903. The cubic root of 1275357664 is about 1084.4528275179.

The spelling of 1275357664 in words is "one billion, two hundred seventy-five million, three hundred fifty-seven thousand, six hundred sixty-four".