77700685260550 has 24 divisors (see below), whose sum is σ = 157661754093432. Its totient is φ = 28254794640000.

The previous prime is 77700685260487. The next prime is 77700685260553. The reversal of 77700685260550 is 5506258600777.

It is a happy number.

It is a super-3 number, since 3×77700685260550³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77700685260553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70636986051 + ... + 70636987150.

It is an arithmetic number, because the mean of its divisors is an integer number (6569239753893).

Almost surely, 2^{77700685260550} is an apocalyptic number.

77700685260550 is an abundant number, since it is smaller than the sum of its proper divisors (79961068832882).

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

77700685260550 is a wasteful number, since it uses less digits than its factorization.

77700685260550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141273973224 (or 141273973219 counting only the distinct ones).

The product of its (nonzero) digits is 24696000, while the sum is 58.

The spelling of 77700685260550 in words is "seventy-seven trillion, seven hundred billion, six hundred eighty-five million, two hundred sixty thousand, five hundred fifty".