1206515646 has 96 divisors (see below), whose sum is σ = 3127707648. Its totient is φ = 328648320.

The previous prime is 1206515617. The next prime is 1206515663. The reversal of 1206515646 is 6465156021.

1206515646 is a `hidden beast` number, since 1 + 2 + 0 + 6 + 5 + 1 + 5 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1206515646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1323931 + ... + 1324841.

It is an arithmetic number, because the mean of its divisors is an integer number (32580288).

Almost surely, 2^1206515646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1206515646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1563853824).

1206515646 is an abundant number, since it is smaller than the sum of its proper divisors (1921192002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1206515646 is a wasteful number, since it uses less digits than its factorization.

1206515646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406 (or 1403 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1206515646 is about 34734.9340865936. The cubic root of 1206515646 is about 1064.5784061632.

The spelling of 1206515646 in words is "one billion, two hundred six million, five hundred fifteen thousand, six hundred forty-six".