616626985536 has 63 divisors (see below), whose sum is σ = 1767503939331. Its totient is φ = 205536046464.

The previous prime is 616626985519. The next prime is 616626985547. The reversal of 616626985536 is 635589626616.

The square root of 616626985536 is 785256.

It is a perfect power (a square), and thus also a powerful number.

616626985536 is a `hidden beast` number, since 6 + 1 + 6 + 6 + 2 + 6 + 98 + 5 + 536 = 666.

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 8 ways as a sum of consecutive naturals, for example, 18829785 + ... + 18862503.

Almost surely, 2^616626985536 is an apocalyptic number.

616626985536 is the 785256-th square number.

It is an amenable number.

616626985536 is an abundant number, since it is smaller than the sum of its proper divisors (1150876953795).

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

616626985536 is an frugal number, since it uses more digits than its factorization.

616626985536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65456 (or 32724 counting only the distinct ones).

The product of its digits is 83980800, while the sum is 63.

The spelling of 616626985536 in words is "six hundred sixteen billion, six hundred twenty-six million, nine hundred eighty-five thousand, five hundred thirty-six".