5481649987 has 4 divisors (see below), whose sum is σ = 5979981816. Its totient is φ = 4983318160.

The previous prime is 5481649969. The next prime is 5481650029. The reversal of 5481649987 is 7899461845.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5481649987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5481649387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249165898 + ... + 249165919.

It is an arithmetic number, because the mean of its divisors is an integer number (1494995454).

Almost surely, 2^5481649987 is an apocalyptic number.

5481649987 is a deficient number, since it is larger than the sum of its proper divisors (498331829).

5481649987 is a wasteful number, since it uses less digits than its factorization.

5481649987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498331828.

The product of its digits is 17418240, while the sum is 61.

The square root of 5481649987 is about 74038.1657457828. The cubic root of 5481649987 is about 1763.2088913872.

The spelling of 5481649987 in words is "five billion, four hundred eighty-one million, six hundred forty-nine thousand, nine hundred eighty-seven".