64351023434 has 4 divisors (see below), whose sum is σ = 96526535154. Its totient is φ = 32175511716.

The previous prime is 64351023383. The next prime is 64351023493. The reversal of 64351023434 is 43432015346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 62024408209 + 2326615225 = 249047^2 + 48235^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64351023394 and 64351023403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16087755857 + ... + 16087755860.

Almost surely, 2^64351023434 is an apocalyptic number.

64351023434 is a deficient number, since it is larger than the sum of its proper divisors (32175511720).

64351023434 is a wasteful number, since it uses less digits than its factorization.

64351023434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32175511719.

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 64351023434 in words is "sixty-four billion, three hundred fifty-one million, twenty-three thousand, four hundred thirty-four".