65019443040 has 384 divisors, whose sum is σ = 249271344000. Its totient is φ = 15755378688.

The previous prime is 65019443029. The next prime is 65019443077. The reversal of 65019443040 is 4034491056.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 65019442986 and 65019443004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2114496 + ... + 2145024.

It is an arithmetic number, because the mean of its divisors is an integer number (649144125).

Almost surely, 2^65019443040 is an apocalyptic number.

65019443040 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 65019443040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124635672000).

65019443040 is an abundant number, since it is smaller than the sum of its proper divisors (184251900960).

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

65019443040 is a wasteful number, since it uses less digits than its factorization.

65019443040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30599 (or 30585 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 65019443040 in words is "sixty-five billion, nineteen million, four hundred forty-three thousand, forty".