1543416129649 has 9 divisors (see below), whose sum is σ = 1639568289547. Its totient is φ = 1452607068064.

The previous prime is 1543416129643. The next prime is 1543416129709. The reversal of 1543416129649 is 9469216143451.

The square root of 1543416129649 is 1242343.

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

It can be written as a sum of positive squares in only one way, i.e., 1201621554225 + 341794575424 = 1096185^2 + 584632^2 .

It is not a de Polignac number, because 1543416129649 - 2²¹ = 1543414032497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1543416129649.

It is not an unprimeable number, because it can be changed into a prime (1543416129643) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21083292 + ... + 21156370.

Almost surely, 2^{1543416129649} is an apocalyptic number.

1543416129649 is the 1242343-rd square number.

1543416129649 is the 621172-nd centered octagonal number.

It is an amenable number.

1543416129649 is a deficient number, since it is larger than the sum of its proper divisors (96152159898).

1543416129649 is an frugal number, since it uses more digits than its factorization.

1543416129649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146192 (or 73096 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 55.

The spelling of 1543416129649 in words is "one trillion, five hundred forty-three billion, four hundred sixteen million, one hundred twenty-nine thousand, six hundred forty-nine".