5149681920 has 180 divisors, whose sum is σ = 18426874620. Its totient is φ = 1373220864.

The previous prime is 5149681909. The next prime is 5149682029. The reversal of 5149681920 is 291869415.

It can be written as a sum of positive squares in 2 ways, for example, as 931958784 + 4217723136 = 30528^2 + 64944^2 .

It is a tau number, because it is divible by the number of its divisors (180).

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

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 78846 + ... + 128514.

Almost surely, 2^5149681920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5149681920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9213437310).

5149681920 is an abundant number, since it is smaller than the sum of its proper divisors (13277192700).

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

5149681920 is an equidigital number, since it uses as much as digits as its factorization.

5149681920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49702 (or 49679 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 5149681920 is about 71761.2842694443. The cubic root of 5149681920 is about 1726.8719489454.

The spelling of 5149681920 in words is "five billion, one hundred forty-nine million, six hundred eighty-one thousand, nine hundred twenty".