65351998620 has 36 divisors (see below), whose sum is σ = 198234396360. Its totient is φ = 17427199584.

The previous prime is 65351998601. The next prime is 65351998627. The reversal of 65351998620 is 2689915356.

It is a happy number.

65351998620 is a `hidden beast` number, since 6 + 5 + 3 + 5 + 1 + 9 + 9 + 8 + 620 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65351998627) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 181533150 + ... + 181533509.

It is an arithmetic number, because the mean of its divisors is an integer number (5506511010).

Almost surely, 2^65351998620 is an apocalyptic number.

65351998620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65351998620 is an abundant number, since it is smaller than the sum of its proper divisors (132882397740).

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

65351998620 is a wasteful number, since it uses less digits than its factorization.

65351998620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363066674 (or 363066669 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 65351998620 in words is "sixty-five billion, three hundred fifty-one million, nine hundred ninety-eight thousand, six hundred twenty".