1326457657 has 8 divisors (see below), whose sum is σ = 1605125376. Its totient is φ = 1070083392.

The previous prime is 1326457631. The next prime is 1326457673. The reversal of 1326457657 is 7567546231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1326457657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1326457687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5573233 + ... + 5573470.

It is an arithmetic number, because the mean of its divisors is an integer number (200640672).

Almost surely, 2^1326457657 is an apocalyptic number.

1326457657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1326457657 is a deficient number, since it is larger than the sum of its proper divisors (278667719).

1326457657 is a wasteful number, since it uses less digits than its factorization.

1326457657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11146727.

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

The square root of 1326457657 is about 36420.5664014167. The cubic root of 1326457657 is about 1098.7472396468.

The spelling of 1326457657 in words is "one billion, three hundred twenty-six million, four hundred fifty-seven thousand, six hundred fifty-seven".