920620656565 has 4 divisors (see below), whose sum is σ = 1104744787884. Its totient is φ = 736496525248.

The previous prime is 920620656547. The next prime is 920620656577. The reversal of 920620656565 is 565656026029.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 562918577841 + 357702078724 = 750279^2 + 598082^2 .

It is a cyclic number.

It is not a de Polignac number, because 920620656565 - 2¹⁷ = 920620525493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92062065652 + ... + 92062065661.

It is an arithmetic number, because the mean of its divisors is an integer number (276186196971).

Almost surely, 2^920620656565 is an apocalyptic number.

It is an amenable number.

920620656565 is a deficient number, since it is larger than the sum of its proper divisors (184124131319).

920620656565 is a wasteful number, since it uses less digits than its factorization.

920620656565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184124131318.

The product of its (nonzero) digits is 5832000, while the sum is 52.

The spelling of 920620656565 in words is "nine hundred twenty billion, six hundred twenty million, six hundred fifty-six thousand, five hundred sixty-five".