77055336665240 has 128 divisors (see below), whose sum is σ = 177635289565440. Its totient is φ = 30073502148096.

The previous prime is 77055336665231. The next prime is 77055336665267. The reversal of 77055336665240 is 4256663355077.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77055336665240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2155557047 + ... + 2155592793.

It is an arithmetic number, because the mean of its divisors is an integer number (1387775699730).

Almost surely, 2^{77055336665240} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77055336665240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88817644782720).

77055336665240 is an abundant number, since it is smaller than the sum of its proper divisors (100579952900200).

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

77055336665240 is a wasteful number, since it uses less digits than its factorization.

77055336665240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43449 (or 43445 counting only the distinct ones).

The product of its (nonzero) digits is 95256000, while the sum is 59.

The spelling of 77055336665240 in words is "seventy-seven trillion, fifty-five billion, three hundred thirty-six million, six hundred sixty-five thousand, two hundred forty".