646476516261 has 12 divisors (see below), whose sum is σ = 933811753888. Its totient is φ = 430978648104.

The previous prime is 646476516233. The next prime is 646476516263. The reversal of 646476516261 is 162615674646.

646476516261 is a `hidden beast` number, since 6 + 4 + 6 + 4 + 7 + 6 + 5 + 1 + 626 + 1 = 666.

It is not a de Polignac number, because 646476516261 - 2¹⁵ = 646476483493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646476516198 and 646476516207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646476516263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312906 + ... + 1179348.

Almost surely, 2^646476516261 is an apocalyptic number.

It is an amenable number.

646476516261 is a deficient number, since it is larger than the sum of its proper divisors (287335237627).

646476516261 is a wasteful number, since it uses less digits than its factorization.

646476516261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949352 (or 949349 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 646476516261 in words is "six hundred forty-six billion, four hundred seventy-six million, five hundred sixteen thousand, two hundred sixty-one".