12549951973 has 8 divisors (see below), whose sum is σ = 14310352728. Its totient is φ = 10903125504.

The previous prime is 12549951961. The next prime is 12549951983. The reversal of 12549951973 is 37915994521.

It can be written as a sum of positive squares in 4 ways, for example, as 45792289 + 12504159684 = 6767^2 + 111822^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12549951973 - 2¹³ = 12549943781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12549951923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28393336 + ... + 28393777.

It is an arithmetic number, because the mean of its divisors is an integer number (1788794091).

Almost surely, 2^12549951973 is an apocalyptic number.

12549951973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12549951973 is a deficient number, since it is larger than the sum of its proper divisors (1760400755).

12549951973 is a wasteful number, since it uses less digits than its factorization.

12549951973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56787143.

The product of its digits is 3061800, while the sum is 55.

The spelling of 12549951973 in words is "twelve billion, five hundred forty-nine million, nine hundred fifty-one thousand, nine hundred seventy-three".