1646472746461 has 4 divisors (see below), whose sum is σ = 1662774456924. Its totient is φ = 1630171036000.

The previous prime is 1646472746447. The next prime is 1646472746467.

1646472746461 is nontrivially palindromic in base 10.

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 1014590838361 + 631881908100 = 1007269^2 + 794910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1646472746461 - 2¹⁵ = 1646472713693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1646472746396 and 1646472746405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646472746467) 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, 8150855080 + ... + 8150855281.

It is an arithmetic number, because the mean of its divisors is an integer number (415693614231).

Almost surely, 2^{1646472746461} is an apocalyptic number.

It is an amenable number.

1646472746461 is a deficient number, since it is larger than the sum of its proper divisors (16301710463).

1646472746461 is a wasteful number, since it uses less digits than its factorization.

1646472746461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16301710462.

The product of its digits is 32514048, while the sum is 58.

The spelling of 1646472746461 in words is "one trillion, six hundred forty-six billion, four hundred seventy-two million, seven hundred forty-six thousand, four hundred sixty-one".