1254783647649 has 16 divisors (see below), whose sum is σ = 1912070337408. Its totient is φ = 717012077952.

The previous prime is 1254783647603. The next prime is 1254783647653. The reversal of 1254783647649 is 9467463874521.

It is not a de Polignac number, because 1254783647649 - 2¹⁷ = 1254783516577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1254783647649.

It is not an unprimeable number, because it can be changed into a prime (1254783637649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2446309 + ... + 2914445.

It is an arithmetic number, because the mean of its divisors is an integer number (119504396088).

Almost surely, 2^{1254783647649} is an apocalyptic number.

It is an amenable number.

1254783647649 is a deficient number, since it is larger than the sum of its proper divisors (657286689759).

1254783647649 is a wasteful number, since it uses less digits than its factorization.

1254783647649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595784.

The product of its digits is 243855360, while the sum is 66.

The spelling of 1254783647649 in words is "one trillion, two hundred fifty-four billion, seven hundred eighty-three million, six hundred forty-seven thousand, six hundred forty-nine".