77243627647198 has 4 divisors (see below), whose sum is σ = 115865441470800. Its totient is φ = 38621813823598.

The previous prime is 77243627647187. The next prime is 77243627647201. The reversal of 77243627647198 is 89174672634277.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 77243627647198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19310906911798 + ... + 19310906911801.

It is an arithmetic number, because the mean of its divisors is an integer number (28966360367700).

Almost surely, 2^{77243627647198} is an apocalyptic number.

77243627647198 is a deficient number, since it is larger than the sum of its proper divisors (38621813823602).

77243627647198 is a wasteful number, since it uses less digits than its factorization.

77243627647198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38621813823601.

The product of its digits is 1194891264, while the sum is 73.

The spelling of 77243627647198 in words is "seventy-seven trillion, two hundred forty-three billion, six hundred twenty-seven million, six hundred forty-seven thousand, one hundred ninety-eight".