4981121509 has 72 divisors (see below), whose sum is σ = 6592884480. Its totient is φ = 3729136320.

The previous prime is 4981121503. The next prime is 4981121513. The reversal of 4981121509 is 9051211894.

It is not a de Polignac number, because 4981121509 - 2³ = 4981121501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4981121501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 48360352 + ... + 48360454.

It is an arithmetic number, because the mean of its divisors is an integer number (91567840).

Almost surely, 2^4981121509 is an apocalyptic number.

4981121509 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

4981121509 is a deficient number, since it is larger than the sum of its proper divisors (1611762971).

4981121509 is a wasteful number, since it uses less digits than its factorization.

4981121509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 4981121509 is about 70577.0607846487. The cubic root of 4981121509 is about 1707.8211146972.

The spelling of 4981121509 in words is "four billion, nine hundred eighty-one million, one hundred twenty-one thousand, five hundred nine".