2642535921 has 16 divisors (see below), whose sum is σ = 3584467008. Its totient is φ = 1731201600.

The previous prime is 2642535919. The next prime is 2642535953. The reversal of 2642535921 is 1295352462.

It is not a de Polignac number, because 2642535921 - 2¹ = 2642535919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2642535921.

It is not an unprimeable number, because it can be changed into a prime (2642535901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210010 + ... + 222236.

It is an arithmetic number, because the mean of its divisors is an integer number (224029188).

Almost surely, 2^2642535921 is an apocalyptic number.

It is an amenable number.

2642535921 is a deficient number, since it is larger than the sum of its proper divisors (941931087).

2642535921 is a wasteful number, since it uses less digits than its factorization.

2642535921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13472.

The product of its digits is 129600, while the sum is 39.

The square root of 2642535921 is about 51405.6020390774. The cubic root of 2642535921 is about 1382.5270368922.

The spelling of 2642535921 in words is "two billion, six hundred forty-two million, five hundred thirty-five thousand, nine hundred twenty-one".