42969244238649 has 27 divisors (see below), whose sum is σ = 63261385788783. Its totient is φ = 28104987457872.

The previous prime is 42969244238647. The next prime is 42969244238651. The reversal of 42969244238649 is 94683244296924.

It is a happy number.

The square root of 42969244238649 is 6555093.

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

42969244238649 is a `hidden beast` number, since 4 + 2 + 9 + 6 + 92 + 442 + 38 + 64 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (42969244238647) and next prime (42969244238651).

It can be written as a sum of positive squares in only one way, i.e., 30976404266025 + 11992839972624 = 5565645^2 + 3463068^2 .

It is not a de Polignac number, because 42969244238649 - 2¹ = 42969244238647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42969244238647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1042239174 + ... + 1042280400.

Almost surely, 2^{42969244238649} is an apocalyptic number.

42969244238649 is the 6555093-rd square number.

42969244238649 is the 3277547-th centered octagonal number.

It is an amenable number.

42969244238649 is a deficient number, since it is larger than the sum of its proper divisors (20292141550134).

42969244238649 is an frugal number, since it uses more digits than its factorization.

42969244238649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82566 (or 41283 counting only the distinct ones).

The product of its digits is 1289945088, while the sum is 72.

The spelling of 42969244238649 in words is "forty-two trillion, nine hundred sixty-nine billion, two hundred forty-four million, two hundred thirty-eight thousand, six hundred forty-nine".