77145258 has 16 divisors (see below), whose sum is σ = 154398240. Its totient is φ = 25697136.

The previous prime is 77145253. The next prime is 77145281. The reversal of 77145258 is 85254177.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77145253) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7141 + ... + 14327.

It is an arithmetic number, because the mean of its divisors is an integer number (9649890).

Almost surely, 2^77145258 is an apocalyptic number.

77145258 is an abundant number, since it is smaller than the sum of its proper divisors (77252982).

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

77145258 is a wasteful number, since it uses less digits than its factorization.

77145258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8981.

The product of its digits is 78400, while the sum is 39.

The square root of 77145258 is about 8783.2373302786. The cubic root of 77145258 is about 425.6994397370.

The spelling of 77145258 in words is "seventy-seven million, one hundred forty-five thousand, two hundred fifty-eight".