1305402452551 has 4 divisors (see below), whose sum is σ = 1313219233872. Its totient is φ = 1297585671232.

The previous prime is 1305402452527. The next prime is 1305402452581. The reversal of 1305402452551 is 1552542045031.

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 1305402452551 - 2²⁹ = 1304865581639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1305402452551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305402452581) 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, 3908390410 + ... + 3908390743.

It is an arithmetic number, because the mean of its divisors is an integer number (328304808468).

Almost surely, 2^{1305402452551} is an apocalyptic number.

1305402452551 is a deficient number, since it is larger than the sum of its proper divisors (7816781321).

1305402452551 is an equidigital number, since it uses as much as digits as its factorization.

1305402452551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7816781320.

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 1305402452551 its reverse (1552542045031), we get a palindrome (2857944497582).

The spelling of 1305402452551 in words is "one trillion, three hundred five billion, four hundred two million, four hundred fifty-two thousand, five hundred fifty-one".