41400117145561 has 4 divisors (see below), whose sum is σ = 41628847074724. Its totient is φ = 41171387216400.

The previous prime is 41400117145531. The next prime is 41400117145591. The reversal of 41400117145561 is 16554171100414.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (41400117145531) and next prime (41400117145591).

It can be written as a sum of positive squares in 2 ways, for example, as 896515454025 + 40503601691536 = 946845^2 + 6364244^2 .

It is a cyclic number.

It is not a de Polignac number, because 41400117145561 - 2¹³ = 41400117137369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41400117145511) 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, 114364964310 + ... + 114364964671.

It is an arithmetic number, because the mean of its divisors is an integer number (10407211768681).

Almost surely, 2^{41400117145561} is an apocalyptic number.

It is an amenable number.

41400117145561 is a deficient number, since it is larger than the sum of its proper divisors (228729929163).

41400117145561 is a wasteful number, since it uses less digits than its factorization.

41400117145561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228729929162.

The product of its (nonzero) digits is 67200, while the sum is 40.

Adding to 41400117145561 its reverse (16554171100414), we get a palindrome (57954288245975).

The spelling of 41400117145561 in words is "forty-one trillion, four hundred billion, one hundred seventeen million, one hundred forty-five thousand, five hundred sixty-one".