77558243946 has 16 divisors (see below), whose sum is σ = 155343606624. Its totient is φ = 25814894864.

The previous prime is 77558243899. The next prime is 77558243957. The reversal of 77558243946 is 64934285577.

It is a self number, because there is not a number n which added to its sum of digits gives 77558243946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9458841 + ... + 9467036.

It is an arithmetic number, because the mean of its divisors is an integer number (9708975414).

Almost surely, 2^77558243946 is an apocalyptic number.

77558243946 is an abundant number, since it is smaller than the sum of its proper divisors (77785362678).

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

77558243946 is a wasteful number, since it uses less digits than its factorization.

77558243946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18926565.

The product of its digits is 50803200, while the sum is 60.

The spelling of 77558243946 in words is "seventy-seven billion, five hundred fifty-eight million, two hundred forty-three thousand, nine hundred forty-six".