77781122034 has 32 divisors (see below), whose sum is σ = 193947734016. Its totient is φ = 20202888720.

The previous prime is 77781122011. The next prime is 77781122047. The reversal of 77781122034 is 43022118777.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84178242 + ... + 84179165.

It is an arithmetic number, because the mean of its divisors is an integer number (6060866688).

Almost surely, 2^77781122034 is an apocalyptic number.

77781122034 is an abundant number, since it is smaller than the sum of its proper divisors (116166611982).

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

77781122034 is a wasteful number, since it uses less digits than its factorization.

77781122034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168357430.

The product of its (nonzero) digits is 131712, while the sum is 42.

The spelling of 77781122034 in words is "seventy-seven billion, seven hundred eighty-one million, one hundred twenty-two thousand, thirty-four".