964545251221 has 4 divisors (see below), whose sum is σ = 968794349472. Its totient is φ = 960296152972.

The previous prime is 964545251149. The next prime is 964545251353. The reversal of 964545251221 is 122152545469.

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 a cyclic number.

It is not a de Polignac number, because 964545251221 - 2¹³ = 964545243029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (964545258221) 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 3 ways as a sum of consecutive naturals, for example, 2124548785 + ... + 2124549238.

It is an arithmetic number, because the mean of its divisors is an integer number (242198587368).

Almost surely, 2^964545251221 is an apocalyptic number.

It is an amenable number.

964545251221 is a deficient number, since it is larger than the sum of its proper divisors (4249098251).

964545251221 is a wasteful number, since it uses less digits than its factorization.

964545251221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249098250.

The product of its digits is 864000, while the sum is 46.

The spelling of 964545251221 in words is "nine hundred sixty-four billion, five hundred forty-five million, two hundred fifty-one thousand, two hundred twenty-one".