4664651640 has 192 divisors, whose sum is σ = 15536102400. Its totient is φ = 1119486720.

The previous prime is 4664651603. The next prime is 4664651657. The reversal of 4664651640 is 461564664.

It is a junction number, because it is equal to n+sod(n) for n = 4664651592 and 4664651601.

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, 1494001 + ... + 1497119.

It is an arithmetic number, because the mean of its divisors is an integer number (80917200).

Almost surely, 2^4664651640 is an apocalyptic number.

4664651640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4664651640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7768051200).

4664651640 is an abundant number, since it is smaller than the sum of its proper divisors (10871450760).

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

4664651640 is a wasteful number, since it uses less digits than its factorization.

4664651640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258 (or 3243 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The square root of 4664651640 is about 68298.2550289537. The cubic root of 4664651640 is about 1670.8587549084.

The spelling of 4664651640 in words is "four billion, six hundred sixty-four million, six hundred fifty-one thousand, six hundred forty".