671305615768 has 8 divisors (see below), whose sum is σ = 1258698029580. Its totient is φ = 335652807880.

The previous prime is 671305615763. The next prime is 671305615787. The reversal of 671305615768 is 867516503176.

It is a happy number.

671305615768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671305615763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41956600978 + ... + 41956600993.

Almost surely, 2^671305615768 is an apocalyptic number.

It is an amenable number.

671305615768 is a deficient number, since it is larger than the sum of its proper divisors (587392413812).

671305615768 is a wasteful number, since it uses less digits than its factorization.

671305615768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83913201977 (or 83913201973 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 671305615768 in words is "six hundred seventy-one billion, three hundred five million, six hundred fifteen thousand, seven hundred sixty-eight".