77802023969 has 8 divisors (see below), whose sum is σ = 78590754792. Its totient is φ = 77013654400.

The previous prime is 77802023963. The next prime is 77802023993. The reversal of 77802023969 is 96932020877.

It can be written as a sum of positive squares in 4 ways, for example, as 13127430625 + 64674593344 = 114575^2 + 254312^2 .

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 77802023969 - 2⁸ = 77802023713 is a prime.

It is a super-2 number, since 2×77802023969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77802023969.

It is not an unprimeable number, because it can be changed into a prime (77802023963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353597 + ... + 529749.

It is an arithmetic number, because the mean of its divisors is an integer number (9823844349).

Almost surely, 2^77802023969 is an apocalyptic number.

It is an amenable number.

77802023969 is a deficient number, since it is larger than the sum of its proper divisors (788730823).

77802023969 is a wasteful number, since it uses less digits than its factorization.

77802023969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180627.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 77802023969 in words is "seventy-seven billion, eight hundred two million, twenty-three thousand, nine hundred sixty-nine".