77422151808 has 256 divisors, whose sum is σ = 249754752000. Its totient is φ = 23505223680.

The previous prime is 77422151731. The next prime is 77422151809. The reversal of 77422151808 is 80815122477.

77422151808 is a `hidden beast` number, since 77 + 42 + 21 + 518 + 0 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (77422151809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1800058 + ... + 1842566.

It is an arithmetic number, because the mean of its divisors is an integer number (975604500).

Almost surely, 2^77422151808 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 77422151808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124877376000).

77422151808 is an abundant number, since it is smaller than the sum of its proper divisors (172332600192).

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

77422151808 is a wasteful number, since it uses less digits than its factorization.

77422151808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42580 (or 42562 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The spelling of 77422151808 in words is "seventy-seven billion, four hundred twenty-two million, one hundred fifty-one thousand, eight hundred eight".