64190861392 has 80 divisors (see below), whose sum is σ = 143083556352. Its totient is φ = 27327605760.

The previous prime is 64190861389. The next prime is 64190861393. The reversal of 64190861392 is 29316809146.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64190861393) 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, 16788793 + ... + 16792615.

Almost surely, 2^64190861392 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 64190861392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71541778176).

64190861392 is an abundant number, since it is smaller than the sum of its proper divisors (78892694960).

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

64190861392 is a wasteful number, since it uses less digits than its factorization.

64190861392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4796 (or 4790 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 64190861392 in words is "sixty-four billion, one hundred ninety million, eight hundred sixty-one thousand, three hundred ninety-two".