74542451236543 has 4 divisors (see below), whose sum is σ = 74564164741648. Its totient is φ = 74520737731440.

The previous prime is 74542451236457. The next prime is 74542451236723. The reversal of 74542451236543 is 34563215424547.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74542451236543 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 (74542451236943) 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, 10856747403 + ... + 10856754268.

It is an arithmetic number, because the mean of its divisors is an integer number (18641041185412).

Almost surely, 2^{74542451236543} is an apocalyptic number.

74542451236543 is a deficient number, since it is larger than the sum of its proper divisors (21713505105).

74542451236543 is a wasteful number, since it uses less digits than its factorization.

74542451236543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21713505104.

The product of its digits is 48384000, while the sum is 55.

The spelling of 74542451236543 in words is "seventy-four trillion, five hundred forty-two billion, four hundred fifty-one million, two hundred thirty-six thousand, five hundred forty-three".