1646411272049 has 4 divisors (see below), whose sum is σ = 1686567644580. Its totient is φ = 1606254899520.

The previous prime is 1646411272043. The next prime is 1646411272067. The reversal of 1646411272049 is 9402721146461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 377167939600 + 1269243332449 = 614140^2 + 1126607^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1646411272049 is a prime.

It is a super-3 number, since 3×1646411272049³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1646411271994 and 1646411272012.

It is not an unprimeable number, because it can be changed into a prime (1646411272043) 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, 20078186204 + ... + 20078186285.

It is an arithmetic number, because the mean of its divisors is an integer number (421641911145).

Almost surely, 2^{1646411272049} is an apocalyptic number.

It is an amenable number.

1646411272049 is a deficient number, since it is larger than the sum of its proper divisors (40156372531).

1646411272049 is an equidigital number, since it uses as much as digits as its factorization.

1646411272049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40156372530.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 1646411272049 in words is "one trillion, six hundred forty-six billion, four hundred eleven million, two hundred seventy-two thousand, forty-nine".