77955958 has 8 divisors (see below), whose sum is σ = 117011952. Its totient is φ = 38951976.

The previous prime is 77955953. The next prime is 77955959. The reversal of 77955958 is 85955977.

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

It is a junction number, because it is equal to n+sod(n) for n = 77955899 and 77955908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77955953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9010 + ... + 15397.

It is an arithmetic number, because the mean of its divisors is an integer number (14626494).

Almost surely, 2^77955958 is an apocalyptic number.

77955958 is a deficient number, since it is larger than the sum of its proper divisors (39055994).

77955958 is a wasteful number, since it uses less digits than its factorization.

77955958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26006.

The product of its digits is 3969000, while the sum is 55.

The square root of 77955958 is about 8829.2671270044. The cubic root of 77955958 is about 427.1854357501.

The spelling of 77955958 in words is "seventy-seven million, nine hundred fifty-five thousand, nine hundred fifty-eight".