1306121651653 has 32 divisors (see below), whose sum is σ = 1613436814080. Its totient is φ = 1029624583680.

The previous prime is 1306121651651. The next prime is 1306121651657. The reversal of 1306121651653 is 3561561216031.

It is not a de Polignac number, because 1306121651653 - 2¹ = 1306121651651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306121651651) 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 31 ways as a sum of consecutive naturals, for example, 49294833 + ... + 49321321.

It is an arithmetic number, because the mean of its divisors is an integer number (50419900440).

Almost surely, 2^{1306121651653} is an apocalyptic number.

1306121651653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1306121651653 is a deficient number, since it is larger than the sum of its proper divisors (307315162427).

1306121651653 is a wasteful number, since it uses less digits than its factorization.

1306121651653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28477.

The product of its (nonzero) digits is 97200, while the sum is 40.

Adding to 1306121651653 its reverse (3561561216031), we get a palindrome (4867682867684).

The spelling of 1306121651653 in words is "one trillion, three hundred six billion, one hundred twenty-one million, six hundred fifty-one thousand, six hundred fifty-three".