321264624641 has 4 divisors (see below), whose sum is σ = 329947452372. Its totient is φ = 312581796912.

The previous prime is 321264624613. The next prime is 321264624647. The reversal of 321264624641 is 146426462123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146426462123 = 43 ⋅3405266561.

It can be written as a sum of positive squares in 2 ways, for example, as 305454077041 + 15810547600 = 552679^2 + 125740^2 .

It is a cyclic number.

It is not a de Polignac number, because 321264624641 - 2²⁶ = 321197515777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321264624647) 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, 4341413810 + ... + 4341413883.

It is an arithmetic number, because the mean of its divisors is an integer number (82486863093).

Almost surely, 2^321264624641 is an apocalyptic number.

It is an amenable number.

321264624641 is a deficient number, since it is larger than the sum of its proper divisors (8682827731).

321264624641 is an equidigital number, since it uses as much as digits as its factorization.

321264624641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8682827730.

The product of its digits is 331776, while the sum is 41.

The spelling of 321264624641 in words is "three hundred twenty-one billion, two hundred sixty-four million, six hundred twenty-four thousand, six hundred forty-one".