408213872641 has 4 divisors (see below), whose sum is σ = 408606764800. Its totient is φ = 407820980484.

The previous prime is 408213872621. The next prime is 408213872657. The reversal of 408213872641 is 146278312804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 408213872641 - 2¹³ = 408213864449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 408213872591 and 408213872600.

It is not an unprimeable number, because it can be changed into a prime (408213872621) 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, 196444521 + ... + 196446598.

It is an arithmetic number, because the mean of its divisors is an integer number (102151691200).

Almost surely, 2^408213872641 is an apocalyptic number.

It is an amenable number.

408213872641 is a deficient number, since it is larger than the sum of its proper divisors (392892159).

408213872641 is a wasteful number, since it uses less digits than its factorization.

408213872641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392892158.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 408213872641 in words is "four hundred eight billion, two hundred thirteen million, eight hundred seventy-two thousand, six hundred forty-one".