77278922322 has 128 divisors (see below), whose sum is σ = 187878113280. Its totient is φ = 20727083520.

The previous prime is 77278922261. The next prime is 77278922323. The reversal of 77278922322 is 22322987277.

It is not an unprimeable number, because it can be changed into a prime (77278922323) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6135243 + ... + 6147825.

It is an arithmetic number, because the mean of its divisors is an integer number (1467797760).

Almost surely, 2^77278922322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77278922322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93939056640).

77278922322 is an abundant number, since it is smaller than the sum of its proper divisors (110599190958).

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

77278922322 is a wasteful number, since it uses less digits than its factorization.

77278922322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12768.

The product of its digits is 2370816, while the sum is 51.

The spelling of 77278922322 in words is "seventy-seven billion, two hundred seventy-eight million, nine hundred twenty-two thousand, three hundred twenty-two".