77923548787 has 8 divisors (see below), whose sum is σ = 89872508000. Its totient is φ = 66178845504.

The previous prime is 77923548757. The next prime is 77923548793. The reversal of 77923548787 is 78784532977.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77923548787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77923548757) 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, 51063162 + ... + 51064687.

It is an arithmetic number, because the mean of its divisors is an integer number (11234063500).

Almost surely, 2^77923548787 is an apocalyptic number.

77923548787 is a deficient number, since it is larger than the sum of its proper divisors (11948959213).

77923548787 is a wasteful number, since it uses less digits than its factorization.

77923548787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102127965.

The product of its digits is 165957120, while the sum is 67.

The spelling of 77923548787 in words is "seventy-seven billion, nine hundred twenty-three million, five hundred forty-eight thousand, seven hundred eighty-seven".