77471293368 has 128 divisors (see below), whose sum is σ = 236213452800. Its totient is φ = 20668483584.

The previous prime is 77471293331. The next prime is 77471293379. The reversal of 77471293368 is 86339217477.

It is a happy number.

It is a super-2 number, since 2×77471293368² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255918 + ... + 469506.

It is an arithmetic number, because the mean of its divisors is an integer number (1845417600).

Almost surely, 2^77471293368 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 77471293368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118106726400).

77471293368 is an abundant number, since it is smaller than the sum of its proper divisors (158742159432).

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

77471293368 is a wasteful number, since it uses less digits than its factorization.

77471293368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213749 (or 213745 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 57.

The spelling of 77471293368 in words is "seventy-seven billion, four hundred seventy-one million, two hundred ninety-three thousand, three hundred sixty-eight".