77332527457 has 4 divisors (see below), whose sum is σ = 77333098500. Its totient is φ = 77331956416.

The previous prime is 77332527427. The next prime is 77332527463. The reversal of 77332527457 is 75472523377.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 62359578961 + 14972948496 = 249719^2 + 122364^2 .

It is a cyclic number.

It is not a de Polignac number, because 77332527457 - 2²⁷ = 77198309729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77332527427) 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, 45669 + ... + 395917.

It is an arithmetic number, because the mean of its divisors is an integer number (19333274625).

Almost surely, 2^77332527457 is an apocalyptic number.

It is an amenable number.

77332527457 is a deficient number, since it is larger than the sum of its proper divisors (571043).

77332527457 is a wasteful number, since it uses less digits than its factorization.

77332527457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571042.

The product of its digits is 8643600, while the sum is 52.

The spelling of 77332527457 in words is "seventy-seven billion, three hundred thirty-two million, five hundred twenty-seven thousand, four hundred fifty-seven".