65155020 has 96 divisors (see below), whose sum is σ = 212502528. Its totient is φ = 14606592.

The previous prime is 65155007. The next prime is 65155037. The reversal of 65155020 is 2055156.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20797 + ... + 23723.

It is an arithmetic number, because the mean of its divisors is an integer number (2213568).

Almost surely, 2^65155020 is an apocalyptic number.

65155020 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 65155020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106251264).

65155020 is an abundant number, since it is smaller than the sum of its proper divisors (147347508).

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

65155020 is a wasteful number, since it uses less digits than its factorization.

65155020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999 (or 2997 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 65155020 is about 8071.8659552795. The cubic root of 65155020 is about 402.3919594798.

The spelling of 65155020 in words is "sixty-five million, one hundred fifty-five thousand, twenty".