77644091046 has 16 divisors (see below), whose sum is σ = 155704508784. Its totient is φ = 25811975904.

The previous prime is 77644091027. The next prime is 77644091051. The reversal of 77644091046 is 64019044677.

It is a junction number, because it is equal to n+sod(n) for n = 77644090986 and 77644091004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17344521 + ... + 17348996.

It is an arithmetic number, because the mean of its divisors is an integer number (9731531799).

Almost surely, 2^77644091046 is an apocalyptic number.

77644091046 is an abundant number, since it is smaller than the sum of its proper divisors (78060417738).

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

77644091046 is a wasteful number, since it uses less digits than its factorization.

77644091046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34693895.

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 77644091046 in words is "seventy-seven billion, six hundred forty-four million, ninety-one thousand, forty-six".