264491649 has 12 divisors (see below), whose sum is σ = 396193616. Its totient is φ = 176327604.

The previous prime is 264491641. The next prime is 264491657. The reversal of 264491649 is 946194462.

264491649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (264491641) and next prime (264491657).

It is not a de Polignac number, because 264491649 - 2³ = 264491641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264491641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 543979 + ... + 544464.

Almost surely, 2^264491649 is an apocalyptic number.

It is an amenable number.

264491649 is a deficient number, since it is larger than the sum of its proper divisors (131701967).

264491649 is an equidigital number, since it uses as much as digits as its factorization.

264491649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088458 (or 1088446 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 264491649 is about 16263.1992240149. The cubic root of 264491649 is about 641.9048465841.

The spelling of 264491649 in words is "two hundred sixty-four million, four hundred ninety-one thousand, six hundred forty-nine".