77873564384 has 144 divisors (see below), whose sum is σ = 200834919936. Its totient is φ = 29361427200.

The previous prime is 77873564371. The next prime is 77873564387. The reversal of 77873564384 is 48346537877.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77873564387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 461867 + ... + 607509.

It is an arithmetic number, because the mean of its divisors is an integer number (1394686944).

Almost surely, 2^77873564384 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 77873564384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100417459968).

77873564384 is an abundant number, since it is smaller than the sum of its proper divisors (122961355552).

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

77873564384 is a wasteful number, since it uses less digits than its factorization.

77873564384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145709 (or 145694 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 62.

The spelling of 77873564384 in words is "seventy-seven billion, eight hundred seventy-three million, five hundred sixty-four thousand, three hundred eighty-four".