542440557420643 has 16 divisors (see below), whose sum is σ = 634355021487616. Its totient is φ = 454132034516160.

The previous prime is 542440557420617. The next prime is 542440557420667. The reversal of 542440557420643 is 346024755044245.

It is a de Polignac number, because none of the positive numbers 2^k-542440557420643 is a prime.

It is a super-2 number, since 2×542440557420643² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542440557420613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24028930 + ... + 40770952.

It is an arithmetic number, because the mean of its divisors is an integer number (39647188842976).

Almost surely, 2^{542440557420643} is an apocalyptic number.

542440557420643 is a deficient number, since it is larger than the sum of its proper divisors (91914464066973).

542440557420643 is a wasteful number, since it uses less digits than its factorization.

542440557420643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16849714.

The product of its (nonzero) digits is 64512000, while the sum is 55.

The spelling of 542440557420643 in words is "five hundred forty-two trillion, four hundred forty billion, five hundred fifty-seven million, four hundred twenty thousand, six hundred forty-three".