542643945 has 64 divisors (see below), whose sum is σ = 940584960. Its totient is φ = 266469632.

The previous prime is 542643929. The next prime is 542643953. The reversal of 542643945 is 549346245.

It is a cyclic number.

It is not a de Polignac number, because 542643945 - 2⁴ = 542643929 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 542643897 and 542643906.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1078564 + ... + 1079066.

It is an arithmetic number, because the mean of its divisors is an integer number (14696640).

Almost surely, 2^542643945 is an apocalyptic number.

It is an amenable number.

542643945 is a deficient number, since it is larger than the sum of its proper divisors (397941015).

542643945 is a wasteful number, since it uses less digits than its factorization.

542643945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its digits is 518400, while the sum is 42.

The square root of 542643945 is about 23294.7192513668. The cubic root of 542643945 is about 815.6521534390.

The spelling of 542643945 in words is "five hundred forty-two million, six hundred forty-three thousand, nine hundred forty-five".