77044261165553 has 16 divisors (see below), whose sum is σ = 84261697984512. Its totient is φ = 69862464210000.

The previous prime is 77044261165523. The next prime is 77044261165681. The reversal of 77044261165553 is 35556116244077.

It is not a de Polignac number, because 77044261165553 - 2¹⁶ = 77044261100017 is a prime.

It is a super-2 number, since 2×77044261165553² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77044261165523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19955078 + ... + 23500928.

It is an arithmetic number, because the mean of its divisors is an integer number (5266356124032).

Almost surely, 2^{77044261165553} is an apocalyptic number.

It is an amenable number.

77044261165553 is a deficient number, since it is larger than the sum of its proper divisors (7217436818959).

77044261165553 is a wasteful number, since it uses less digits than its factorization.

77044261165553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550876.

The product of its (nonzero) digits is 21168000, while the sum is 56.

The spelling of 77044261165553 in words is "seventy-seven trillion, forty-four billion, two hundred sixty-one million, one hundred sixty-five thousand, five hundred fifty-three".