65250215540 has 12 divisors (see below), whose sum is σ = 137025452676. Its totient is φ = 26100086208.

The previous prime is 65250215497. The next prime is 65250215551. The reversal of 65250215540 is 4551205256.

It can be written as a sum of positive squares in 2 ways, for example, as 7232822116 + 58017393424 = 85046^2 + 240868^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65250215540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1631255369 + ... + 1631255408.

It is an arithmetic number, because the mean of its divisors is an integer number (11418787723).

Almost surely, 2^65250215540 is an apocalyptic number.

It is an amenable number.

65250215540 is an abundant number, since it is smaller than the sum of its proper divisors (71775237136).

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

65250215540 is a wasteful number, since it uses less digits than its factorization.

65250215540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3262510786 (or 3262510784 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 65250215540 in words is "sixty-five billion, two hundred fifty million, two hundred fifteen thousand, five hundred forty".