542171404452637 has 2 divisors, whose sum is σ = 542171404452638. Its totient is φ = 542171404452636.

The previous prime is 542171404452563. The next prime is 542171404452757. The reversal of 542171404452637 is 736254404171245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395844011597241 + 146327392855396 = 19895829^2 + 12096586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542171404452637 is a prime.

It is a super-2 number, since 2×542171404452637² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542171404456637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271085702226318 + 271085702226319.

It is an arithmetic number, because the mean of its divisors is an integer number (271085702226319).

Almost surely, 2^{542171404452637} is an apocalyptic number.

It is an amenable number.

542171404452637 is a deficient number, since it is larger than the sum of its proper divisors (1).

542171404452637 is an equidigital number, since it uses as much as digits as its factorization.

542171404452637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22579200, while the sum is 55.

The spelling of 542171404452637 in words is "five hundred forty-two trillion, one hundred seventy-one billion, four hundred four million, four hundred fifty-two thousand, six hundred thirty-seven".