44111142991 has 2 divisors, whose sum is σ = 44111142992. Its totient is φ = 44111142990.

The previous prime is 44111142953. The next prime is 44111143031. The reversal of 44111142991 is 19924111144.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 44111142991 - 2³⁵ = 9751404623 is a prime.

It is a super-4 number, since 4×44111142991⁴ (a number of 44 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 44111142991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44111142941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22055571495 + 22055571496.

It is an arithmetic number, because the mean of its divisors is an integer number (22055571496).

Almost surely, 2^44111142991 is an apocalyptic number.

44111142991 is a deficient number, since it is larger than the sum of its proper divisors (1).

44111142991 is an equidigital number, since it uses as much as digits as its factorization.

44111142991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 37.

The spelling of 44111142991 in words is "forty-four billion, one hundred eleven million, one hundred forty-two thousand, nine hundred ninety-one".