640238747239000 has 512 divisors, whose sum is σ = 1879298573967360. Its totient is φ = 198736222464000.

The previous prime is 640238747238983. The next prime is 640238747239057. The reversal of 640238747239000 is 932747832046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 15776012709 + ... + 15776053291.

It is an arithmetic number, because the mean of its divisors is an integer number (3670505027280).

Almost surely, 2^{640238747239000} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640238747239000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (939649286983680).

640238747239000 is an abundant number, since it is smaller than the sum of its proper divisors (1239059826728360).

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

640238747239000 is a wasteful number, since it uses less digits than its factorization.

640238747239000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43948 (or 43934 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 55.

The spelling of 640238747239000 in words is "six hundred forty trillion, two hundred thirty-eight billion, seven hundred forty-seven million, two hundred thirty-nine thousand".