56947617769 has 27 divisors (see below), whose sum is σ = 67309217847. Its totient is φ = 48040491744.

The previous prime is 56947617719. The next prime is 56947617803. The reversal of 56947617769 is 96771674965.

The square root of 56947617769 is 238637.

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

It can be written as a sum of positive squares in only one way, i.e., 32326242025 + 24621375744 = 179795^2 + 156912^2 .

It is not a de Polignac number, because 56947617769 - 2¹³ = 56947609577 is a prime.

It is a super-2 number, since 2×56947617769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56947617719) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 121943274 + ... + 121943740.

Almost surely, 2^56947617769 is an apocalyptic number.

56947617769 is the 238637-th square number.

56947617769 is the 119319-th centered octagonal number.

It is an amenable number.

56947617769 is a deficient number, since it is larger than the sum of its proper divisors (10361600078).

56947617769 is an frugal number, since it uses more digits than its factorization.

56947617769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094 (or 547 counting only the distinct ones).

The product of its digits is 120022560, while the sum is 67.

The spelling of 56947617769 in words is "fifty-six billion, nine hundred forty-seven million, six hundred seventeen thousand, seven hundred sixty-nine".