542379656647 has 4 divisors (see below), whose sum is σ = 543541069656. Its totient is φ = 541218243640.

The previous prime is 542379656629. The next prime is 542379656657. The reversal of 542379656647 is 746656973245.

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

It is a cyclic number.

It is not a de Polignac number, because 542379656647 - 2³¹ = 540232172999 is a prime.

It is a super-2 number, since 2×542379656647² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542379656617) 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, 580705804 + ... + 580706737.

It is an arithmetic number, because the mean of its divisors is an integer number (135885267414).

Almost surely, 2^542379656647 is an apocalyptic number.

542379656647 is a deficient number, since it is larger than the sum of its proper divisors (1161413009).

542379656647 is a wasteful number, since it uses less digits than its factorization.

542379656647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161413008.

The product of its digits is 228614400, while the sum is 64.

The spelling of 542379656647 in words is "five hundred forty-two billion, three hundred seventy-nine million, six hundred fifty-six thousand, six hundred forty-seven".