40947163561 has 8 divisors (see below), whose sum is σ = 41360772744. Its totient is φ = 40533715200.

The previous prime is 40947163547. The next prime is 40947163567. The reversal of 40947163561 is 16536174904.

It can be written as a sum of positive squares in 4 ways, for example, as 987153561 + 39960010000 = 31419^2 + 199900^2 .

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 40947163561 - 2²³ = 40938774953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40947163567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509265 + ... + 584161.

It is an arithmetic number, because the mean of its divisors is an integer number (5170096593).

Almost surely, 2^40947163561 is an apocalyptic number.

It is an amenable number.

40947163561 is a deficient number, since it is larger than the sum of its proper divisors (413609183).

40947163561 is a wasteful number, since it uses less digits than its factorization.

40947163561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80411.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 40947163561 in words is "forty billion, nine hundred forty-seven million, one hundred sixty-three thousand, five hundred sixty-one".