77045645301665 has 8 divisors (see below), whose sum is σ = 92456514220200. Its totient is φ = 61635356335872.

The previous prime is 77045645301557. The next prime is 77045645301679. The reversal of 77045645301665 is 56610354654077.

It can be written as a sum of positive squares in 4 ways, for example, as 99643760896 + 76946001540769 = 315664^2 + 8771887^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77045645301665 - 2²² = 77045641107361 is a prime.

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, 144695864 + ... + 145227353.

It is an arithmetic number, because the mean of its divisors is an integer number (11557064277525).

Almost surely, 2^{77045645301665} is an apocalyptic number.

It is an amenable number.

77045645301665 is a deficient number, since it is larger than the sum of its proper divisors (15410868918535).

77045645301665 is a wasteful number, since it uses less digits than its factorization.

77045645301665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289976371.

The product of its (nonzero) digits is 63504000, while the sum is 59.

The spelling of 77045645301665 in words is "seventy-seven trillion, forty-five billion, six hundred forty-five million, three hundred one thousand, six hundred sixty-five".