1040563661251 has 4 divisors (see below), whose sum is σ = 1045107607600. Its totient is φ = 1036019714904.

The previous prime is 1040563661239. The next prime is 1040563661281. The reversal of 1040563661251 is 1521663650401.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1040563661251 - 2⁵ = 1040563661219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040563661201) 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, 2271972831 + ... + 2271973288.

It is an arithmetic number, because the mean of its divisors is an integer number (261276901900).

Almost surely, 2^{1040563661251} is an apocalyptic number.

1040563661251 is a deficient number, since it is larger than the sum of its proper divisors (4543946349).

1040563661251 is an equidigital number, since it uses as much as digits as its factorization.

1040563661251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543946348.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 1040563661251 in words is "one trillion, forty billion, five hundred sixty-three million, six hundred sixty-one thousand, two hundred fifty-one".