216907961742 has 12 divisors (see below), whose sum is σ = 469967250480. Its totient is φ = 72302653908.

The previous prime is 216907961741. The next prime is 216907961759. The reversal of 216907961742 is 247169709612.

216907961742 is a `hidden beast` number, since 2 + 16 + 9 + 0 + 7 + 9 + 617 + 4 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216907961741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6025221142 + ... + 6025221177.

It is an arithmetic number, because the mean of its divisors is an integer number (39163937540).

Almost surely, 2^216907961742 is an apocalyptic number.

216907961742 is an abundant number, since it is smaller than the sum of its proper divisors (253059288738).

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

216907961742 is a wasteful number, since it uses less digits than its factorization.

216907961742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12050442327 (or 12050442324 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 216907961742 in words is "two hundred sixteen billion, nine hundred seven million, nine hundred sixty-one thousand, seven hundred forty-two".