2451394570249 has 3 divisors (see below), whose sum is σ = 2451396135943. Its totient is φ = 2451393004556.

The previous prime is 2451394570243. The next prime is 2451394570253. The reversal of 2451394570249 is 9420754931542.

The square root of 2451394570249 is 1565693.

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 can be written as a sum of positive squares in only one way, i.e., 6336956025 + 2445057614224 = 79605^2 + 1563668^2 .

It is not a de Polignac number, because 2451394570249 - 2¹¹ = 2451394568201 is a prime.

It is a super-4 number, since 4×2451394570249⁴ (a number of 51 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2451394570249.

It is not an unprimeable number, because it can be changed into a prime (2451394570243) 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, 782847 + ... + 2348539.

Almost surely, 2^{2451394570249} is an apocalyptic number.

2451394570249 is the 1565693-rd square number.

2451394570249 is the 782847-th centered octagonal number.

It is an amenable number.

2451394570249 is a deficient number, since it is larger than the sum of its proper divisors (1565694).

2451394570249 is an frugal number, since it uses more digits than its factorization.

2451394570249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131386 (or 1565693 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 2451394570249 in words is "two trillion, four hundred fifty-one billion, three hundred ninety-four million, five hundred seventy thousand, two hundred forty-nine".