40347661046561 has 4 divisors (see below), whose sum is σ = 44015630232624. Its totient is φ = 36679691860500.

The previous prime is 40347661046521. The next prime is 40347661046587. The reversal of 40347661046561 is 16564016674304.

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 40347661046561 - 2³⁴ = 40330481177377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40347661046521) 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, 1833984593015 + ... + 1833984593036.

It is an arithmetic number, because the mean of its divisors is an integer number (11003907558156).

Almost surely, 2^{40347661046561} is an apocalyptic number.

It is an amenable number.

40347661046561 is a deficient number, since it is larger than the sum of its proper divisors (3667969186063).

40347661046561 is a wasteful number, since it uses less digits than its factorization.

40347661046561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3667969186062.

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 40347661046561 in words is "forty trillion, three hundred forty-seven billion, six hundred sixty-one million, forty-six thousand, five hundred sixty-one".