542665461445 has 4 divisors (see below), whose sum is σ = 651198553740. Its totient is φ = 434132369152.

The previous prime is 542665461391. The next prime is 542665461449. The reversal of 542665461445 is 544164566245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544164566245 = 5 ⋅108832913249.

It can be written as a sum of positive squares in 2 ways, for example, as 264394441249 + 278271020196 = 514193^2 + 527514^2 .

It is a cyclic number.

It is not a de Polignac number, because 542665461445 - 2¹⁵ = 542665428677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 542665461392 and 542665461401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542665461449) 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, 54266546140 + ... + 54266546149.

It is an arithmetic number, because the mean of its divisors is an integer number (162799638435).

Almost surely, 2^542665461445 is an apocalyptic number.

It is an amenable number.

542665461445 is a deficient number, since it is larger than the sum of its proper divisors (108533092295).

542665461445 is a wasteful number, since it uses less digits than its factorization.

542665461445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108533092294.

The product of its digits is 13824000, while the sum is 52.

The spelling of 542665461445 in words is "five hundred forty-two billion, six hundred sixty-five million, four hundred sixty-one thousand, four hundred forty-five".