4651436440 has 96 divisors (see below), whose sum is σ = 12388128480. Its totient is φ = 1539707904.

The previous prime is 4651436423. The next prime is 4651436443. The reversal of 4651436440 is 446341564.

It is a self number, because there is not a number n which added to its sum of digits gives 4651436440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4651436443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225604 + ... + 245356.

It is an arithmetic number, because the mean of its divisors is an integer number (129043005).

Almost surely, 2^4651436440 is an apocalyptic number.

4651436440 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 4651436440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6194064240).

4651436440 is an abundant number, since it is smaller than the sum of its proper divisors (7736692040).

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

4651436440 is a wasteful number, since it uses less digits than its factorization.

4651436440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19829 (or 19796 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 4651436440 is about 68201.4401607473. The cubic root of 4651436440 is about 1669.2793859895.

The spelling of 4651436440 in words is "four billion, six hundred fifty-one million, four hundred thirty-six thousand, four hundred forty".