65745000420 has 384 divisors, whose sum is σ = 219731097600. Its totient is φ = 14508748800.

The previous prime is 65745000367. The next prime is 65745000427. The reversal of 65745000420 is 2400054756.

65745000420 is a nontrivial binomial coefficient, being equal to C(362616, 2).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (65745000427) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 126189760 + ... + 126190280.

It is an arithmetic number, because the mean of its divisors is an integer number (572216400).

Almost surely, 2^65745000420 is an apocalyptic number.

65745000420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

65745000420 is the 362615-th triangular number and also the 181308-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65745000420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109865548800).

65745000420 is an abundant number, since it is smaller than the sum of its proper divisors (153986097180).

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

65745000420 is a wasteful number, since it uses less digits than its factorization.

65745000420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The spelling of 65745000420 in words is "sixty-five billion, seven hundred forty-five million, four hundred twenty", and thus it is an aban number.