1340001511553 has 4 divisors (see below), whose sum is σ = 1376217768660. Its totient is φ = 1303785254448.

The previous prime is 1340001511529. The next prime is 1340001511579. The reversal of 1340001511553 is 3551151000431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1149319075969 + 190682435584 = 1072063^2 + 436672^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340001511553 - 2⁶ = 1340001511489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340001511853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18108128498 + ... + 18108128571.

It is an arithmetic number, because the mean of its divisors is an integer number (344054442165).

Almost surely, 2^{1340001511553} is an apocalyptic number.

It is an amenable number.

1340001511553 is a deficient number, since it is larger than the sum of its proper divisors (36216257107).

1340001511553 is an equidigital number, since it uses as much as digits as its factorization.

1340001511553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36216257106.

The product of its (nonzero) digits is 4500, while the sum is 29.

Adding to 1340001511553 its reverse (3551151000431), we get a palindrome (4891152511984).

The spelling of 1340001511553 in words is "one trillion, three hundred forty billion, one million, five hundred eleven thousand, five hundred fifty-three".