655394505493556 has 24 divisors (see below), whose sum is σ = 1153138084116480. Its totient is φ = 325927055199200.

The previous prime is 655394505493499. The next prime is 655394505493603.

655394505493556 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×655394505493556² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67144796 + ... + 76283763.

It is an arithmetic number, because the mean of its divisors is an integer number (48047420171520).

Almost surely, 2^{655394505493556} is an apocalyptic number.

It is an amenable number.

655394505493556 is a deficient number, since it is larger than the sum of its proper divisors (497743578622924).

655394505493556 is a wasteful number, since it uses less digits than its factorization.

655394505493556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143434735 (or 143434733 counting only the distinct ones).

The product of its (nonzero) digits is 6561000000, while the sum is 74.

The spelling of 655394505493556 in words is "six hundred fifty-five trillion, three hundred ninety-four billion, five hundred five million, four hundred ninety-three thousand, five hundred fifty-six".