77423616487 has 4 divisors (see below), whose sum is σ = 88484133136. Its totient is φ = 66363099840.

The previous prime is 77423616467. The next prime is 77423616521. The reversal of 77423616487 is 78461632477.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 77423616487 - 2¹⁵ = 77423583719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77423616407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5530258314 + ... + 5530258327.

It is an arithmetic number, because the mean of its divisors is an integer number (22121033284).

Almost surely, 2^77423616487 is an apocalyptic number.

77423616487 is a deficient number, since it is larger than the sum of its proper divisors (11060516649).

77423616487 is a wasteful number, since it uses less digits than its factorization.

77423616487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11060516648.

The product of its digits is 9483264, while the sum is 55.

The spelling of 77423616487 in words is "seventy-seven billion, four hundred twenty-three million, six hundred sixteen thousand, four hundred eighty-seven".