77485145 has 8 divisors (see below), whose sum is σ = 93661704. Its totient is φ = 61535104.

The previous prime is 77485139. The next prime is 77485153. The reversal of 77485145 is 54158477.

It can be written as a sum of positive squares in 4 ways, for example, as 6031936 + 71453209 = 2456^2 + 8453^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 77485145 - 2⁶ = 77485081 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 55874 + ... + 57243.

It is an arithmetic number, because the mean of its divisors is an integer number (11707713).

Almost surely, 2^77485145 is an apocalyptic number.

It is an amenable number.

77485145 is a deficient number, since it is larger than the sum of its proper divisors (16176559).

77485145 is a wasteful number, since it uses less digits than its factorization.

77485145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113259.

The product of its digits is 156800, while the sum is 41.

The square root of 77485145 is about 8802.5646830909. The cubic root of 77485145 is about 426.3237068069.

The spelling of 77485145 in words is "seventy-seven million, four hundred eighty-five thousand, one hundred forty-five".