42956401949 has 8 divisors (see below), whose sum is σ = 43100949048. Its totient is φ = 42812098560.

The previous prime is 42956401937. The next prime is 42956401963. The reversal of 42956401949 is 94910465924.

It can be written as a sum of positive squares in 4 ways, for example, as 3003588025 + 39952813924 = 54805^2 + 199882^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42956401949 - 2¹² = 42956397853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42956401949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42956406949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295679 + ... + 416339.

It is an arithmetic number, because the mean of its divisors is an integer number (5387618631).

Almost surely, 2^42956401949 is an apocalyptic number.

It is an amenable number.

42956401949 is a deficient number, since it is larger than the sum of its proper divisors (144547099).

42956401949 is a wasteful number, since it uses less digits than its factorization.

42956401949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121855.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 42956401949 in words is "forty-two billion, nine hundred fifty-six million, four hundred one thousand, nine hundred forty-nine".