77991059650 has 48 divisors (see below), whose sum is σ = 166517217216. Its totient is φ = 26621968320.

The previous prime is 77991059633. The next prime is 77991059711. The reversal of 77991059650 is 5695019977.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 411369 + ... + 570268.

It is an arithmetic number, because the mean of its divisors is an integer number (3469108692).

Almost surely, 2^77991059650 is an apocalyptic number.

77991059650 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

77991059650 is an abundant number, since it is smaller than the sum of its proper divisors (88526157566).

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

77991059650 is a wasteful number, since it uses less digits than its factorization.

77991059650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981883 (or 981878 counting only the distinct ones).

The product of its (nonzero) digits is 5358150, while the sum is 58.

The spelling of 77991059650 in words is "seventy-seven billion, nine hundred ninety-one million, fifty-nine thousand, six hundred fifty".