65274252021 has 12 divisors (see below), whose sum is σ = 102856397280. Its totient is φ = 39560152680.

The previous prime is 65274251971. The next prime is 65274252049. The reversal of 65274252021 is 12025247256.

65274252021 is a `hidden beast` number, since 6 + 5 + 27 + 425 + 202 + 1 = 666.

It is not a de Polignac number, because 65274252021 - 2⁷ = 65274251893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65274252061) 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, 329667841 + ... + 329668038.

It is an arithmetic number, because the mean of its divisors is an integer number (8571366440).

Almost surely, 2^65274252021 is an apocalyptic number.

It is an amenable number.

65274252021 is a deficient number, since it is larger than the sum of its proper divisors (37582145259).

65274252021 is a wasteful number, since it uses less digits than its factorization.

65274252021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659335896 (or 659335893 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

Adding to 65274252021 its reverse (12025247256), we get a palindrome (77299499277).

The spelling of 65274252021 in words is "sixty-five billion, two hundred seventy-four million, two hundred fifty-two thousand, twenty-one".