1520545518 has 48 divisors (see below), whose sum is σ = 3501098640. Its totient is φ = 475285248.

The previous prime is 1520545517. The next prime is 1520545561. The reversal of 1520545518 is 8155450251.

1520545518 is a `hidden beast` number, since 1 + 52 + 0 + 54 + 551 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520545513) 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, 75793 + ... + 93731.

It is an arithmetic number, because the mean of its divisors is an integer number (72939555).

Almost surely, 2^1520545518 is an apocalyptic number.

1520545518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520545518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1750549320).

1520545518 is an abundant number, since it is smaller than the sum of its proper divisors (1980553122).

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

1520545518 is a wasteful number, since it uses less digits than its factorization.

1520545518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18241 (or 18238 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

The square root of 1520545518 is about 38994.1728723665. The cubic root of 1520545518 is about 1149.9169487597.

Adding to 1520545518 its reverse (8155450251), we get a palindrome (9675995769).

The spelling of 1520545518 in words is "one billion, five hundred twenty million, five hundred forty-five thousand, five hundred eighteen".