77728705367622 has 16 divisors (see below), whose sum is σ = 155460358037232. Its totient is φ = 25909077238880.

The previous prime is 77728705367611. The next prime is 77728705367629. The reversal of 77728705367622 is 22676350782777.

It is a super-2 number, since 2×77728705367622² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77728705367629) 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, 122461329 + ... + 123094412.

It is an arithmetic number, because the mean of its divisors is an integer number (9716272377327).

Almost surely, 2^{77728705367622} is an apocalyptic number.

77728705367622 is an abundant number, since it is smaller than the sum of its proper divisors (77731652669610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77728705367622 is a wasteful number, since it uses less digits than its factorization.

77728705367622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245608503.

The product of its (nonzero) digits is 580849920, while the sum is 69.

The spelling of 77728705367622 in words is "seventy-seven trillion, seven hundred twenty-eight billion, seven hundred five million, three hundred sixty-seven thousand, six hundred twenty-two".