1542166543 has 4 divisors (see below), whose sum is σ = 1632882240. Its totient is φ = 1451450848.

The previous prime is 1542166523. The next prime is 1542166589. The reversal of 1542166543 is 3456612451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3456612451 = 22643 ⋅152657.

It is a cyclic number.

It is not a de Polignac number, because 1542166543 - 2⁵ = 1542166511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542166523) 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, 45357823 + ... + 45357856.

It is an arithmetic number, because the mean of its divisors is an integer number (408220560).

Almost surely, 2^1542166543 is an apocalyptic number.

1542166543 is a deficient number, since it is larger than the sum of its proper divisors (90715697).

1542166543 is an equidigital number, since it uses as much as digits as its factorization.

1542166543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90715696.

The product of its digits is 86400, while the sum is 37.

The square root of 1542166543 is about 39270.4283526421. The cubic root of 1542166543 is about 1155.3416386589.

Adding to 1542166543 its reverse (3456612451), we get a palindrome (4998778994).

The spelling of 1542166543 in words is "one billion, five hundred forty-two million, one hundred sixty-six thousand, five hundred forty-three".