64061619000 has 128 divisors (see below), whose sum is σ = 200652379200. Its totient is φ = 17016422400.

The previous prime is 64061618981. The next prime is 64061619001. The reversal of 64061619000 is 91616046.

It is a super-2 number, since 2×64061619000² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64061619001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 729456 + ... + 812544.

Almost surely, 2^64061619000 is an apocalyptic number.

64061619000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64061619000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100326189600).

64061619000 is an abundant number, since it is smaller than the sum of its proper divisors (136590760200).

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

64061619000 is a wasteful number, since it uses less digits than its factorization.

64061619000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83370 (or 83356 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 64061619000 in words is "sixty-four billion, sixty-one million, six hundred nineteen thousand".