7895661312001 has 4 divisors (see below), whose sum is σ = 7897392441604. Its totient is φ = 7893930182400.

The previous prime is 7895661311933. The next prime is 7895661312037. The reversal of 7895661312001 is 1002131665987.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4231495843600 + 3664165468401 = 2057060^2 + 1914201^2 .

It is a cyclic number.

It is not a de Polignac number, because 7895661312001 - 2¹¹ = 7895661309953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7895661312101) 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, 865557960 + ... + 865567081.

It is an arithmetic number, because the mean of its divisors is an integer number (1974348110401).

Almost surely, 2^{7895661312001} is an apocalyptic number.

It is an amenable number.

7895661312001 is a deficient number, since it is larger than the sum of its proper divisors (1731129603).

7895661312001 is a wasteful number, since it uses less digits than its factorization.

7895661312001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731129602.

The product of its (nonzero) digits is 544320, while the sum is 49.

Adding to 7895661312001 its reverse (1002131665987), we get a palindrome (8897792977988).

The spelling of 7895661312001 in words is "seven trillion, eight hundred ninety-five billion, six hundred sixty-one million, three hundred twelve thousand, one".