77863238477 has 8 divisors (see below), whose sum is σ = 81966494400. Its totient is φ = 73760501664.

The previous prime is 77863238473. The next prime is 77863238489. The reversal of 77863238477 is 77483236877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77863238477 - 2² = 77863238473 is a prime.

It is a super-3 number, since 3×77863238477³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77863238473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199568 + ... + 442214.

It is an arithmetic number, because the mean of its divisors is an integer number (10245811800).

Almost surely, 2^77863238477 is an apocalyptic number.

It is an amenable number.

77863238477 is a deficient number, since it is larger than the sum of its proper divisors (4103255923).

77863238477 is a wasteful number, since it uses less digits than its factorization.

77863238477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259555.

The product of its digits is 66382848, while the sum is 62.

The spelling of 77863238477 in words is "seventy-seven billion, eight hundred sixty-three million, two hundred thirty-eight thousand, four hundred seventy-seven".