781424228041 has 4 divisors (see below), whose sum is σ = 781455649300. Its totient is φ = 781392806784.

The previous prime is 781424228023. The next prime is 781424228087. The reversal of 781424228041 is 140822424187.

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 175355750025 + 606068478016 = 418755^2 + 778504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-781424228041 is a prime.

It is a super-2 number, since 2×781424228041² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (781424229041) 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, 15673296 + ... + 15723073.

It is an arithmetic number, because the mean of its divisors is an integer number (195363912325).

Almost surely, 2^781424228041 is an apocalyptic number.

It is an amenable number.

781424228041 is a deficient number, since it is larger than the sum of its proper divisors (31421259).

781424228041 is a wasteful number, since it uses less digits than its factorization.

781424228041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31421258.

The product of its (nonzero) digits is 229376, while the sum is 43.

The spelling of 781424228041 in words is "seven hundred eighty-one billion, four hundred twenty-four million, two hundred twenty-eight thousand, forty-one".