1340635553 has 8 divisors (see below), whose sum is σ = 1378323936. Its totient is φ = 1303243200.

The previous prime is 1340635511. The next prime is 1340635601. The reversal of 1340635553 is 3555360431.

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

It is a cyclic number.

It is not a de Polignac number, because 1340635553 - 2⁸ = 1340635297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340631553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64808 + ... + 82953.

It is an arithmetic number, because the mean of its divisors is an integer number (172290492).

Almost surely, 2^1340635553 is an apocalyptic number.

It is an amenable number.

1340635553 is a deficient number, since it is larger than the sum of its proper divisors (37688383).

1340635553 is a wasteful number, since it uses less digits than its factorization.

1340635553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148015.

The product of its (nonzero) digits is 81000, while the sum is 35.

The square root of 1340635553 is about 36614.6903988003. The cubic root of 1340635553 is about 1102.6480425358.

Adding to 1340635553 its reverse (3555360431), we get a palindrome (4895995984).

The spelling of 1340635553 in words is "one billion, three hundred forty million, six hundred thirty-five thousand, five hundred fifty-three".