77250645 has 32 divisors (see below), whose sum is σ = 137773440. Its totient is φ = 41068800.

The previous prime is 77250643. The next prime is 77250707. The reversal of 77250645 is 54605277.

77250645 is a `hidden beast` number, since 7 + 7 + 2 + 5 + 0 + 645 = 666.

It is not a de Polignac number, because 77250645 - 2¹ = 77250643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77250643) 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 31 ways as a sum of consecutive naturals, for example, 53422 + ... + 54848.

It is an arithmetic number, because the mean of its divisors is an integer number (4305420).

Almost surely, 2^77250645 is an apocalyptic number.

It is an amenable number.

77250645 is a deficient number, since it is larger than the sum of its proper divisors (60522795).

77250645 is a wasteful number, since it uses less digits than its factorization.

77250645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842 (or 1836 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 77250645 is about 8789.2346083149. The cubic root of 77250645 is about 425.8931987769.

The spelling of 77250645 in words is "seventy-seven million, two hundred fifty thousand, six hundred forty-five".