77577425 has 12 divisors (see below), whose sum is σ = 98012700. Its totient is φ = 60889920.

The previous prime is 77577391. The next prime is 77577427. The reversal of 77577425 is 52477577.

It can be written as a sum of positive squares in 6 ways, for example, as 541696 + 77035729 = 736^2 + 8777^2 .

It is not a de Polignac number, because 77577425 - 2¹⁴ = 77561041 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (77577427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27950 + ... + 30599.

It is an arithmetic number, because the mean of its divisors is an integer number (8167725).

Almost surely, 2^77577425 is an apocalyptic number.

It is an amenable number.

77577425 is a deficient number, since it is larger than the sum of its proper divisors (20435275).

77577425 is a wasteful number, since it uses less digits than its factorization.

77577425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58612 (or 58607 counting only the distinct ones).

The product of its digits is 480200, while the sum is 44.

The square root of 77577425 is about 8807.8047775822. The cubic root of 77577425 is about 426.4928813601.

The spelling of 77577425 in words is "seventy-seven million, five hundred seventy-seven thousand, four hundred twenty-five".