1642153543 has 2 divisors, whose sum is σ = 1642153544. Its totient is φ = 1642153542.

The previous prime is 1642153523. The next prime is 1642153547. The reversal of 1642153543 is 3453512461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1642153543 - 2²¹ = 1640056391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642153499 and 1642153508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642153547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821076771 + 821076772.

It is an arithmetic number, because the mean of its divisors is an integer number (821076772).

Almost surely, 2^1642153543 is an apocalyptic number.

1642153543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642153543 is an equidigital number, since it uses as much as digits as its factorization.

1642153543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 34.

The square root of 1642153543 is about 40523.4937166084. The cubic root of 1642153543 is about 1179.7896644633.

The spelling of 1642153543 in words is "one billion, six hundred forty-two million, one hundred fifty-three thousand, five hundred forty-three".