611816502969 has 135 divisors (see below), whose sum is σ = 1098685115853. Its totient is φ = 327992910336.

The previous prime is 611816502961. The next prime is 611816502989. The reversal of 611816502969 is 969205618116.

The square root of 611816502969 is 782187.

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

611816502969 is a `hidden beast` number, since 6 + 118 + 16 + 502 + 9 + 6 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 97211133369 + 514605369600 = 311787^2 + 717360^2 .

It is not a de Polignac number, because 611816502969 - 2³ = 611816502961 is a prime.

It is a super-2 number, since 2×611816502969² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (611816502961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 1954685157 + ... + 1954685469.

Almost surely, 2^611816502969 is an apocalyptic number.

611816502969 is the 782187-th square number.

611816502969 is the 391094-th centered octagonal number.

It is an amenable number.

611816502969 is a deficient number, since it is larger than the sum of its proper divisors (486868612884).

611816502969 is an frugal number, since it uses more digits than its factorization.

611816502969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 611816502969 in words is "six hundred eleven billion, eight hundred sixteen million, five hundred two thousand, nine hundred sixty-nine".