4991655240 has 256 divisors, whose sum is σ = 19548345600. Its totient is φ = 1116979200.

The previous prime is 4991655233. The next prime is 4991655259. The reversal of 4991655240 is 425561994.

4991655240 is a `hidden beast` number, since 4 + 9 + 91 + 6 + 552 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138280 + ... + 170600.

It is an arithmetic number, because the mean of its divisors is an integer number (76360725).

Almost surely, 2^4991655240 is an apocalyptic number.

4991655240 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 4991655240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9774172800).

4991655240 is an abundant number, since it is smaller than the sum of its proper divisors (14556690360).

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

4991655240 is a wasteful number, since it uses less digits than its factorization.

4991655240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32365 (or 32355 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 4991655240 is about 70651.6471145578. The cubic root of 4991655240 is about 1709.0241277080.

It can be divided in two parts, 499165 and 5240, that added together give a palindrome (504405).

The spelling of 4991655240 in words is "four billion, nine hundred ninety-one million, six hundred fifty-five thousand, two hundred forty".