438056177252781 has 16 divisors (see below), whose sum is σ = 599077655654720. Its totient is φ = 284568339162240.

The previous prime is 438056177252747. The next prime is 438056177252963. The reversal of 438056177252781 is 187252771650834.

It is not a de Polignac number, because 438056177252781 - 2⁹ = 438056177252269 is a prime.

It is a super-2 number, since 2×438056177252781² (a number of 30 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 (438056177257781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4032943696 + ... + 4033052313.

It is an arithmetic number, because the mean of its divisors is an integer number (37442353478420).

Almost surely, 2^{438056177252781} is an apocalyptic number.

It is an amenable number.

438056177252781 is a deficient number, since it is larger than the sum of its proper divisors (161021478401939).

438056177252781 is a wasteful number, since it uses less digits than its factorization.

438056177252781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8065996476.

The product of its (nonzero) digits is 158054400, while the sum is 66.

The spelling of 438056177252781 in words is "four hundred thirty-eight trillion, fifty-six billion, one hundred seventy-seven million, two hundred fifty-two thousand, seven hundred eighty-one".