1143809625781 has 4 divisors (see below), whose sum is σ = 1148938817152. Its totient is φ = 1138680434412.

The previous prime is 1143809625767. The next prime is 1143809625787. The reversal of 1143809625781 is 1875269083411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1143809625781 - 2⁷ = 1143809625653 is a prime.

It is a super-2 number, since 2×1143809625781² (a number of 25 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 (1143809625787) 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, 2564595351 + ... + 2564595796.

It is an arithmetic number, because the mean of its divisors is an integer number (287234704288).

It is a 1-persistent number, because it is pandigital, but 2⋅1143809625781 = 2287619251562 is not.

Almost surely, 2^{1143809625781} is an apocalyptic number.

It is an amenable number.

1143809625781 is a deficient number, since it is larger than the sum of its proper divisors (5129191371).

1143809625781 is an equidigital number, since it uses as much as digits as its factorization.

1143809625781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129191370.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 1143809625781 in words is "one trillion, one hundred forty-three billion, eight hundred nine million, six hundred twenty-five thousand, seven hundred eighty-one".