77883249888 has 144 divisors (see below), whose sum is σ = 231645173760. Its totient is φ = 24774849792.

The previous prime is 77883249841. The next prime is 77883249919. The reversal of 77883249888 is 88894238877.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×77883249888² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2894545 + ... + 2921327.

It is an arithmetic number, because the mean of its divisors is an integer number (1608647040).

Almost surely, 2^77883249888 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 77883249888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115822586880).

77883249888 is an abundant number, since it is smaller than the sum of its proper divisors (153761923872).

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

77883249888 is a wasteful number, since it uses less digits than its factorization.

77883249888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27261 (or 27250 counting only the distinct ones).

The product of its digits is 346816512, while the sum is 72.

The spelling of 77883249888 in words is "seventy-seven billion, eight hundred eighty-three million, two hundred forty-nine thousand, eight hundred eighty-eight".