4000061648 has 40 divisors (see below), whose sum is σ = 8952016320. Its totient is φ = 1711255040.

The previous prime is 4000061623. The next prime is 4000061693. The reversal of 4000061648 is 8461600004.

It is a self number, because there is not a number n which added to its sum of digits gives 4000061648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665468 + ... + 671451.

It is an arithmetic number, because the mean of its divisors is an integer number (223800408).

Almost surely, 2^4000061648 is an apocalyptic number.

It is an amenable number.

4000061648 is an abundant number, since it is smaller than the sum of its proper divisors (4951954672).

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

4000061648 is a wasteful number, since it uses less digits than its factorization.

4000061648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336955 (or 1336949 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 4000061648 is about 63246.0405717227. The cubic root of 4000061648 is about 1587.4092069346.

The spelling of 4000061648 in words is "four billion, sixty-one thousand, six hundred forty-eight".