65152503021 has 4 divisors (see below), whose sum is σ = 86870004032. Its totient is φ = 43435002012.

The previous prime is 65152503011. The next prime is 65152503023. The reversal of 65152503021 is 12030525156.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65152503021 - 2⁷ = 65152502893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65152503021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65152503023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10858750501 + ... + 10858750506.

It is an arithmetic number, because the mean of its divisors is an integer number (21717501008).

Almost surely, 2^65152503021 is an apocalyptic number.

It is an amenable number.

65152503021 is a deficient number, since it is larger than the sum of its proper divisors (21717501011).

65152503021 is a wasteful number, since it uses less digits than its factorization.

65152503021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21717501010.

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 65152503021 in words is "sixty-five billion, one hundred fifty-two million, five hundred three thousand, twenty-one".