11444207781 has 32 divisors (see below), whose sum is σ = 16979200128. Its totient is φ = 6824079360.

The previous prime is 11444207741. The next prime is 11444207807. The reversal of 11444207781 is 18770244411.

It is not a de Polignac number, because 11444207781 - 2²² = 11440013477 is a prime.

It is a super-2 number, since 2×11444207781² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11444207711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10621 + ... + 151661.

It is an arithmetic number, because the mean of its divisors is an integer number (530600004).

Almost surely, 2^11444207781 is an apocalyptic number.

It is an amenable number.

11444207781 is a deficient number, since it is larger than the sum of its proper divisors (5534992347).

11444207781 is a wasteful number, since it uses less digits than its factorization.

11444207781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141141.

The product of its (nonzero) digits is 50176, while the sum is 39.

The spelling of 11444207781 in words is "eleven billion, four hundred forty-four million, two hundred seven thousand, seven hundred eighty-one".