77761630422 has 128 divisors (see below), whose sum is σ = 203976299520. Its totient is φ = 21499395840.

The previous prime is 77761630409. The next prime is 77761630477. The reversal of 77761630422 is 22403616777.

77761630422 is a `hidden beast` number, since 7 + 7 + 7 + 6 + 1 + 630 + 4 + 2 + 2 = 666.

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 63 ways as a sum of consecutive naturals, for example, 1435897 + ... + 1489067.

It is an arithmetic number, because the mean of its divisors is an integer number (1593564840).

Almost surely, 2^77761630422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77761630422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101988149760).

77761630422 is an abundant number, since it is smaller than the sum of its proper divisors (126214669098).

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

77761630422 is a wasteful number, since it uses less digits than its factorization.

77761630422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53315 (or 53309 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 45.

The spelling of 77761630422 in words is "seventy-seven billion, seven hundred sixty-one million, six hundred thirty thousand, four hundred twenty-two".