655981887542 has 16 divisors (see below), whose sum is σ = 998685035280. Its totient is φ = 323097985152.

The previous prime is 655981887527. The next prime is 655981887611. The reversal of 655981887542 is 245788189556.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2658788 + ... + 2895015.

It is an arithmetic number, because the mean of its divisors is an integer number (62417814705).

Almost surely, 2^655981887542 is an apocalyptic number.

655981887542 is a deficient number, since it is larger than the sum of its proper divisors (342703147738).

655981887542 is a wasteful number, since it uses less digits than its factorization.

655981887542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5554687.

The product of its digits is 193536000, while the sum is 68.

The spelling of 655981887542 in words is "six hundred fifty-five billion, nine hundred eighty-one million, eight hundred eighty-seven thousand, five hundred forty-two".