65156064421 has 16 divisors (see below), whose sum is σ = 76085452800. Its totient is φ = 54633178800.

The previous prime is 65156064401. The next prime is 65156064433. The reversal of 65156064421 is 12446065156.

It is a cyclic number.

It is not a de Polignac number, because 65156064421 - 2⁹ = 65156063909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65156064401) 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 15 ways as a sum of consecutive naturals, for example, 643396 + ... + 737746.

It is an arithmetic number, because the mean of its divisors is an integer number (4755340800).

Almost surely, 2^65156064421 is an apocalyptic number.

It is an amenable number.

65156064421 is a deficient number, since it is larger than the sum of its proper divisors (10929388379).

65156064421 is a wasteful number, since it uses less digits than its factorization.

65156064421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96504.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 65156064421 in words is "sixty-five billion, one hundred fifty-six million, sixty-four thousand, four hundred twenty-one".