263746954969 has 9 divisors (see below), whose sum is σ = 264531435519. Its totient is φ = 262964798520.

The previous prime is 263746954967. The next prime is 263746955009. The reversal of 263746954969 is 969459647362.

The square root of 263746954969 is 513563.

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., 153536234569 + 110210720400 = 391837^2 + 331980^2 .

It is not a de Polignac number, because 263746954969 - 2¹ = 263746954967 is a prime.

It is a super-2 number, since 2×263746954969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 263746954898 and 263746954907.

It is not an unprimeable number, because it can be changed into a prime (263746954967) 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, 258321679 + ... + 258322699.

Almost surely, 2^263746954969 is an apocalyptic number.

263746954969 is the 513563-rd square number.

263746954969 is the 256782-nd centered octagonal number.

It is an amenable number.

263746954969 is a deficient number, since it is larger than the sum of its proper divisors (784480550).

263746954969 is an frugal number, since it uses more digits than its factorization.

263746954969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048 (or 1524 counting only the distinct ones).

The product of its digits is 529079040, while the sum is 70.

The spelling of 263746954969 in words is "two hundred sixty-three billion, seven hundred forty-six million, nine hundred fifty-four thousand, nine hundred sixty-nine".