264654040561 has 8 divisors (see below), whose sum is σ = 265301884224. Its totient is φ = 264006968400.

The previous prime is 264654040543. The next prime is 264654040577. The reversal of 264654040561 is 165040456462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264654040561 - 2³¹ = 262506556913 is a prime.

It is a super-2 number, since 2×264654040561² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264654040501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497050 + ... + 881116.

It is an arithmetic number, because the mean of its divisors is an integer number (33162735528).

Almost surely, 2^264654040561 is an apocalyptic number.

It is an amenable number.

264654040561 is a deficient number, since it is larger than the sum of its proper divisors (647843663).

264654040561 is an equidigital number, since it uses as much as digits as its factorization.

264654040561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385751.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 264654040561 in words is "two hundred sixty-four billion, six hundred fifty-four million, forty thousand, five hundred sixty-one".