77042523737 has 4 divisors (see below), whose sum is σ = 81574436916. Its totient is φ = 72510610560.

The previous prime is 77042523713. The next prime is 77042523743. The reversal of 77042523737 is 73732524077.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31748468761 + 45294054976 = 178181^2 + 212824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77042523737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77042523691 and 77042523700.

It is not an unprimeable number, because it can be changed into a prime (77042528737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2265956564 + ... + 2265956597.

It is an arithmetic number, because the mean of its divisors is an integer number (20393609229).

Almost surely, 2^77042523737 is an apocalyptic number.

It is an amenable number.

77042523737 is a deficient number, since it is larger than the sum of its proper divisors (4531913179).

77042523737 is a wasteful number, since it uses less digits than its factorization.

77042523737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4531913178.

The product of its (nonzero) digits is 1728720, while the sum is 47.

The spelling of 77042523737 in words is "seventy-seven billion, forty-two million, five hundred twenty-three thousand, seven hundred thirty-seven".