1820655901641 has 8 divisors (see below), whose sum is σ = 2427898693824. Its totient is φ = 1213591855280.

The previous prime is 1820655901633. The next prime is 1820655901663. The reversal of 1820655901641 is 1461095560281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1820655901641 - 2³ = 1820655901633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1820655901621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44662686 + ... + 44703431.

It is an arithmetic number, because the mean of its divisors is an integer number (303487336728).

Almost surely, 2^{1820655901641} is an apocalyptic number.

It is an amenable number.

1820655901641 is a deficient number, since it is larger than the sum of its proper divisors (607242792183).

1820655901641 is an equidigital number, since it uses as much as digits as its factorization.

1820655901641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89372911.

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 1820655901641 in words is "one trillion, eight hundred twenty billion, six hundred fifty-five million, nine hundred one thousand, six hundred forty-one".