264810981 has 4 divisors (see below), whose sum is σ = 353081312. Its totient is φ = 176540652.

The previous prime is 264810979. The next prime is 264811003. The reversal of 264810981 is 189018462.

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 not a de Polignac number, because 264810981 - 2¹ = 264810979 is a prime.

It is a super-2 number, since 2×264810981² = 140249711316364722, which contains 22 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 (264810911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44135161 + ... + 44135166.

It is an arithmetic number, because the mean of its divisors is an integer number (88270328).

Almost surely, 2^264810981 is an apocalyptic number.

It is an amenable number.

264810981 is a deficient number, since it is larger than the sum of its proper divisors (88270331).

264810981 is an equidigital number, since it uses as much as digits as its factorization.

264810981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88270330.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 264810981 is about 16273.0138880295. The cubic root of 264810981 is about 642.1630756820.

The spelling of 264810981 in words is "two hundred sixty-four million, eight hundred ten thousand, nine hundred eighty-one".