64531359390 has 32 divisors (see below), whose sum is σ = 154912292640. Its totient is φ = 17204248064.

The previous prime is 64531359379. The next prime is 64531359391. The reversal of 64531359390 is 9395313546.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64531359391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128535 + ... + 381554.

It is an arithmetic number, because the mean of its divisors is an integer number (4841009145).

Almost surely, 2^64531359390 is an apocalyptic number.

64531359390 is an abundant number, since it is smaller than the sum of its proper divisors (90380933250).

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

64531359390 is a wasteful number, since it uses less digits than its factorization.

64531359390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514316.

The product of its (nonzero) digits is 1312200, while the sum is 48.

The spelling of 64531359390 in words is "sixty-four billion, five hundred thirty-one million, three hundred fifty-nine thousand, three hundred ninety".