36401043561 has 4 divisors (see below), whose sum is σ = 48534724752. Its totient is φ = 24267362372.

The previous prime is 36401043557. The next prime is 36401043641. The reversal of 36401043561 is 16534010463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36401043561 - 2² = 36401043557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (36401045561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6066840591 + ... + 6066840596.

It is an arithmetic number, because the mean of its divisors is an integer number (12133681188).

Almost surely, 2^36401043561 is an apocalyptic number.

It is an amenable number.

36401043561 is a deficient number, since it is larger than the sum of its proper divisors (12133681191).

36401043561 is a wasteful number, since it uses less digits than its factorization.

36401043561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12133681190.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 36401043561 in words is "thirty-six billion, four hundred one million, forty-three thousand, five hundred sixty-one".