1321430977645 has 16 divisors (see below), whose sum is σ = 1626160999680. Its totient is φ = 1030238352000.

The previous prime is 1321430977631. The next prime is 1321430977663. The reversal of 1321430977645 is 5467790341231.

It is not a de Polignac number, because 1321430977645 - 2²³ = 1321422589037 is a prime.

It is a super-3 number, since 3×1321430977645³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321430977592 and 1321430977601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3318681 + ... + 3695470.

It is an arithmetic number, because the mean of its divisors is an integer number (101635062480).

Almost surely, 2^{1321430977645} is an apocalyptic number.

It is an amenable number.

1321430977645 is a deficient number, since it is larger than the sum of its proper divisors (304730022035).

1321430977645 is an equidigital number, since it uses as much as digits as its factorization.

1321430977645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7015116.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 1321430977645 in words is "one trillion, three hundred twenty-one billion, four hundred thirty million, nine hundred seventy-seven thousand, six hundred forty-five".