1306454620651 has 4 divisors (see below), whose sum is σ = 1383304892472. Its totient is φ = 1229604348832.

The previous prime is 1306454620637. The next prime is 1306454620661. The reversal of 1306454620651 is 1560264546031.

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 1306454620651 - 2²¹ = 1306452523499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1306454620598 and 1306454620607.

It is not an unprimeable number, because it can be changed into a prime (1306454620631) 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, 38425135885 + ... + 38425135918.

It is an arithmetic number, because the mean of its divisors is an integer number (345826223118).

Almost surely, 2^{1306454620651} is an apocalyptic number.

1306454620651 is a deficient number, since it is larger than the sum of its proper divisors (76850271821).

1306454620651 is an equidigital number, since it uses as much as digits as its factorization.

1306454620651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76850271820.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 1306454620651 in words is "one trillion, three hundred six billion, four hundred fifty-four million, six hundred twenty thousand, six hundred fifty-one".