42451245369 has 63 divisors (see below), whose sum is σ = 69037957983. Its totient is φ = 26079339312.

The previous prime is 42451245313. The next prime is 42451245371. The reversal of 42451245369 is 96354215424.

The square root of 42451245369 is 206037.

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

42451245369 is a `hidden beast` number, since 4 + 2 + 45 + 1 + 245 + 369 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6279770025 + 36171475344 = 79245^2 + 190188^2 .

It is not a de Polignac number, because 42451245369 - 2¹⁷ = 42451114297 is a prime.

It is a super-2 number, since 2×42451245369² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42451245379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 72318694 + ... + 72319280.

Almost surely, 2^42451245369 is an apocalyptic number.

42451245369 is the 206037-th square number.

42451245369 is the 103019-th centered octagonal number.

It is an amenable number.

42451245369 is a deficient number, since it is larger than the sum of its proper divisors (26586712614).

42451245369 is an frugal number, since it uses more digits than its factorization.

42451245369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 603 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The spelling of 42451245369 in words is "forty-two billion, four hundred fifty-one million, two hundred forty-five thousand, three hundred sixty-nine".