640475167323 has 8 divisors (see below), whose sum is σ = 864255647808. Its totient is φ = 421839065864.

The previous prime is 640475167301. The next prime is 640475167337. The reversal of 640475167323 is 323761574046.

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 640475167323 - 2⁵ = 640475167291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640475167823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286094465 + ... + 1286094962.

It is an arithmetic number, because the mean of its divisors is an integer number (108031955976).

Almost surely, 2^640475167323 is an apocalyptic number.

640475167323 is a deficient number, since it is larger than the sum of its proper divisors (223780480485).

640475167323 is a wasteful number, since it uses less digits than its factorization.

640475167323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572189513.

The product of its (nonzero) digits is 2540160, while the sum is 48.

The spelling of 640475167323 in words is "six hundred forty billion, four hundred seventy-five million, one hundred sixty-seven thousand, three hundred twenty-three".