1345253361631 has 4 divisors (see below), whose sum is σ = 1381611560632. Its totient is φ = 1308895162632.

The previous prime is 1345253361607. The next prime is 1345253361643. The reversal of 1345253361631 is 1361633525431.

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

It is not a de Polignac number, because 1345253361631 - 2⁹ = 1345253361119 is a prime.

It is a super-2 number, since 2×1345253361631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345253361601) 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, 18179099445 + ... + 18179099518.

It is an arithmetic number, because the mean of its divisors is an integer number (345402890158).

Almost surely, 2^{1345253361631} is an apocalyptic number.

1345253361631 is a deficient number, since it is larger than the sum of its proper divisors (36358199001).

1345253361631 is an equidigital number, since it uses as much as digits as its factorization.

1345253361631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36358199000.

The product of its digits is 583200, while the sum is 43.

The spelling of 1345253361631 in words is "one trillion, three hundred forty-five billion, two hundred fifty-three million, three hundred sixty-one thousand, six hundred thirty-one".