264404045225621 has 16 divisors (see below), whose sum is σ = 312605880576000. Its totient is φ = 218810165349888.

The previous prime is 264404045225609. The next prime is 264404045225633. The reversal of 264404045225621 is 126522540404462.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (264404045225609) and next prime (264404045225633).

It is not a de Polignac number, because 264404045225621 - 2¹⁴ = 264404045209237 is a prime.

It is a super-3 number, since 3×264404045225621³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264404045224621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14372021 + ... + 27117578.

It is an arithmetic number, because the mean of its divisors is an integer number (19537867536000).

Almost surely, 2^{264404045225621} is an apocalyptic number.

It is an amenable number.

264404045225621 is a deficient number, since it is larger than the sum of its proper divisors (48201835350379).

264404045225621 is a wasteful number, since it uses less digits than its factorization.

264404045225621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41521028.

The product of its (nonzero) digits is 3686400, while the sum is 47.

The spelling of 264404045225621 in words is "two hundred sixty-four trillion, four hundred four billion, forty-five million, two hundred twenty-five thousand, six hundred twenty-one".