542379656646 has 48 divisors (see below), whose sum is σ = 1241771880960. Its totient is φ = 170743613040.

The previous prime is 542379656629. The next prime is 542379656657. The reversal of 542379656646 is 646656973245.

542379656646 is a `hidden beast` number, since 5 + 4 + 23 + 7 + 9 + 6 + 566 + 46 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8259040 + ... + 8324451.

It is an arithmetic number, because the mean of its divisors is an integer number (25870247520).

Almost surely, 2^542379656646 is an apocalyptic number.

542379656646 is an abundant number, since it is smaller than the sum of its proper divisors (699392224314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

542379656646 is a wasteful number, since it uses less digits than its factorization.

542379656646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16583601 (or 16583598 counting only the distinct ones).

The product of its digits is 195955200, while the sum is 63.

It can be divided in two parts, 542379 and 656646, that added together give a square (1199025 = 1095²).

The spelling of 542379656646 in words is "five hundred forty-two billion, three hundred seventy-nine million, six hundred fifty-six thousand, six hundred forty-six".