1567145948449 has 3 divisors (see below), whose sum is σ = 1567147200307. Its totient is φ = 1567144696592.

The previous prime is 1567145948393. The next prime is 1567145948513. The reversal of 1567145948449 is 9448495417651.

The square root of 1567145948449 is 1251857.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1159121390625 + 408024557824 = 1076625^2 + 638768^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1567145948449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1567145948149) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 625929 + ... + 1877785.

Almost surely, 2^{1567145948449} is an apocalyptic number.

1567145948449 is the 1251857-th square number.

1567145948449 is the 625929-th centered octagonal number.

It is an amenable number.

1567145948449 is a deficient number, since it is larger than the sum of its proper divisors (1251858).

1567145948449 is an frugal number, since it uses more digits than its factorization.

1567145948449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503714 (or 1251857 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 67.

The spelling of 1567145948449 in words is "one trillion, five hundred sixty-seven billion, one hundred forty-five million, nine hundred forty-eight thousand, four hundred forty-nine".