247775968441 has 3 divisors (see below), whose sum is σ = 247776466213. Its totient is φ = 247775470670.

The previous prime is 247775968411. The next prime is 247775968459. The reversal of 247775968441 is 144869577742.

The square root of 247775968441 is 497771.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 247775968441 - 2⁷ = 247775968313 is a prime.

It is a super-2 number, since 2×247775968441² (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 (247775968411) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 248886 + ... + 746656.

Almost surely, 2^247775968441 is an apocalyptic number.

247775968441 is the 497771-st square number.

247775968441 is the 248886-th centered octagonal number.

It is an amenable number.

247775968441 is a deficient number, since it is larger than the sum of its proper divisors (497772).

247775968441 is an frugal number, since it uses more digits than its factorization.

247775968441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995542 (or 497771 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 64.

Multiplying 247775968441 by its sum of digits (64), we get a square (15857661980224 = 3982168²).

The spelling of 247775968441 in words is "two hundred forty-seven billion, seven hundred seventy-five million, nine hundred sixty-eight thousand, four hundred forty-one".