77728726211532 has 48 divisors (see below), whose sum is σ = 206457328127232. Its totient is φ = 22530065567680.

The previous prime is 77728726211503. The next prime is 77728726211537. The reversal of 77728726211532 is 23511262782777.

It is not an unprimeable number, because it can be changed into a prime (77728726211537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12801170583 + ... + 12801176654.

It is an arithmetic number, because the mean of its divisors is an integer number (4301194335984).

Almost surely, 2^{77728726211532} is an apocalyptic number.

It is an amenable number.

77728726211532 is an abundant number, since it is smaller than the sum of its proper divisors (128728601915700).

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

77728726211532 is a wasteful number, since it uses less digits than its factorization.

77728726211532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25602347278 (or 25602347276 counting only the distinct ones).

The product of its digits is 27659520, while the sum is 60.

The spelling of 77728726211532 in words is "seventy-seven trillion, seven hundred twenty-eight billion, seven hundred twenty-six million, two hundred eleven thousand, five hundred thirty-two".