640148632223 has 8 divisors (see below), whose sum is σ = 640986255360. Its totient is φ = 639311125120.

The previous prime is 640148632219. The next prime is 640148632241. The reversal of 640148632223 is 322236841046.

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 640148632223 - 2² = 640148632219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640148632523) 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, 18927458 + ... + 18961248.

It is an arithmetic number, because the mean of its divisors is an integer number (80123281920).

Almost surely, 2^640148632223 is an apocalyptic number.

640148632223 is a deficient number, since it is larger than the sum of its proper divisors (837623137).

640148632223 is a wasteful number, since it uses less digits than its factorization.

640148632223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58017.

The product of its (nonzero) digits is 331776, while the sum is 41.

The spelling of 640148632223 in words is "six hundred forty billion, one hundred forty-eight million, six hundred thirty-two thousand, two hundred twenty-three".