77421986830 has 8 divisors (see below), whose sum is σ = 139359576312. Its totient is φ = 30968794728.

The previous prime is 77421986827. The next prime is 77421986869. The reversal of 77421986830 is 3868912477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3871099332 + ... + 3871099351.

It is an arithmetic number, because the mean of its divisors is an integer number (17419947039).

Almost surely, 2^77421986830 is an apocalyptic number.

77421986830 is a deficient number, since it is larger than the sum of its proper divisors (61937589482).

77421986830 is a wasteful number, since it uses less digits than its factorization.

77421986830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7742198690.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 77421986830 in words is "seventy-seven billion, four hundred twenty-one million, nine hundred eighty-six thousand, eight hundred thirty".