64403043642312 has 32 divisors (see below), whose sum is σ = 164751972110880. Its totient is φ = 20968432813440.

The previous prime is 64403043642281. The next prime is 64403043642323. The reversal of 64403043642312 is 21324634030446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31203023989 + ... + 31203026052.

It is an arithmetic number, because the mean of its divisors is an integer number (5148499128465).

Almost surely, 2^{64403043642312} is an apocalyptic number.

It is an amenable number.

64403043642312 is an abundant number, since it is smaller than the sum of its proper divisors (100348928468568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64403043642312 is a wasteful number, since it uses less digits than its factorization.

64403043642312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62406050093 (or 62406050089 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 42.

Adding to 64403043642312 its reverse (21324634030446), we get a palindrome (85727677672758).

The spelling of 64403043642312 in words is "sixty-four trillion, four hundred three billion, forty-three million, six hundred forty-two thousand, three hundred twelve".