264297781801 has 9 divisors (see below), whose sum is σ = 270922902103. Its totient is φ = 257830930480.

The previous prime is 264297781757. The next prime is 264297781829. The reversal of 264297781801 is 108187792462.

The square root of 264297781801 is 514099.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 12735348201 + 251562433600 = 112851^2 + 501560^2 .

It is not a de Polignac number, because 264297781801 - 2⁷ = 264297781673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264297781301) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21071790 + ... + 21084328.

Almost surely, 2^264297781801 is an apocalyptic number.

264297781801 is the 514099-th square number.

264297781801 is the 257050-th centered octagonal number.

It is an amenable number.

264297781801 is a deficient number, since it is larger than the sum of its proper divisors (6625120302).

264297781801 is an frugal number, since it uses more digits than its factorization.

264297781801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25160 (or 12580 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 264297781801 in words is "two hundred sixty-four billion, two hundred ninety-seven million, seven hundred eighty-one thousand, eight hundred one".