77847048444 has 96 divisors (see below), whose sum is σ = 208662854400. Its totient is φ = 22340136960.

The previous prime is 77847048443. The next prime is 77847048469. The reversal of 77847048444 is 44484074877.

It is a super-2 number, since 2×77847048444² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77847048443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10753194 + ... + 10760430.

It is an arithmetic number, because the mean of its divisors is an integer number (2173571400).

Almost surely, 2^77847048444 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 77847048444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104331427200).

77847048444 is an abundant number, since it is smaller than the sum of its proper divisors (130815805956).

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

77847048444 is a wasteful number, since it uses less digits than its factorization.

77847048444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11563 (or 11561 counting only the distinct ones).

The product of its (nonzero) digits is 22478848, while the sum is 57.

The spelling of 77847048444 in words is "seventy-seven billion, eight hundred forty-seven million, forty-eight thousand, four hundred forty-four".