65381910 has 32 divisors (see below), whose sum is σ = 171182592. Its totient is φ = 15850080.

The previous prime is 65381909. The next prime is 65381917. The reversal of 65381910 is 1918356.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65381917) 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, 98734 + ... + 99393.

It is an arithmetic number, because the mean of its divisors is an integer number (5349456).

Almost surely, 2^65381910 is an apocalyptic number.

65381910 is an abundant number, since it is smaller than the sum of its proper divisors (105800682).

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

65381910 is a wasteful number, since it uses less digits than its factorization.

65381910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198148.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 65381910 is about 8085.9081122654. The cubic root of 65381910 is about 402.8585029092.

It can be divided in two parts, 6538 and 1910, that added together give a palindrome (8448).

The spelling of 65381910 in words is "sixty-five million, three hundred eighty-one thousand, nine hundred ten".