12754396981 has 4 divisors (see below), whose sum is σ = 12759458764. Its totient is φ = 12749335200.

The previous prime is 12754396961. The next prime is 12754396987. The reversal of 12754396981 is 18969345721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3512458756 + 9241938225 = 59266^2 + 96135^2 .

It is a cyclic number.

It is not a de Polignac number, because 12754396981 - 2¹⁹ = 12753872693 is a prime.

It is a super-2 number, since 2×12754396981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12754396987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2527110 + ... + 2532151.

It is an arithmetic number, because the mean of its divisors is an integer number (3189864691).

Almost surely, 2^12754396981 is an apocalyptic number.

It is an amenable number.

12754396981 is a deficient number, since it is larger than the sum of its proper divisors (5061783).

12754396981 is an equidigital number, since it uses as much as digits as its factorization.

12754396981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5061782.

The product of its digits is 3265920, while the sum is 55.

The spelling of 12754396981 in words is "twelve billion, seven hundred fifty-four million, three hundred ninety-six thousand, nine hundred eighty-one".