623688378418777 has 8 divisors (see below), whose sum is σ = 714313028085696. Its totient is φ = 533445306225072.

The previous prime is 623688378418697. The next prime is 623688378418789. The reversal of 623688378418777 is 777814873886326.

It is a happy number.

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 623688378418777 - 2¹¹ = 623688378416729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623688378418694 and 623688378418703.

It is not an unprimeable number, because it can be changed into a prime (623688378418177) 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, 95394364798 + ... + 95394371335.

It is an arithmetic number, because the mean of its divisors is an integer number (89289128510712).

Almost surely, 2^{623688378418777} is an apocalyptic number.

It is an amenable number.

623688378418777 is a deficient number, since it is larger than the sum of its proper divisors (90624649666919).

623688378418777 is a wasteful number, since it uses less digits than its factorization.

623688378418777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190788736607.

The product of its digits is 25491013632, while the sum is 85.

The spelling of 623688378418777 in words is "six hundred twenty-three trillion, six hundred eighty-eight billion, three hundred seventy-eight million, four hundred eighteen thousand, seven hundred seventy-seven".