537520993218 has 512 divisors, whose sum is σ = 1500874997760. Its totient is φ = 141678028800.

The previous prime is 537520993199. The next prime is 537520993309. The reversal of 537520993218 is 812399025735.

537520993218 is a `hidden beast` number, since 5 + 3 + 7 + 520 + 9 + 93 + 21 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 871184446 + ... + 871185062.

It is an arithmetic number, because the mean of its divisors is an integer number (2931396480).

Almost surely, 2^537520993218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 537520993218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (750437498880).

537520993218 is an abundant number, since it is smaller than the sum of its proper divisors (963354004542).

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

537520993218 is a wasteful number, since it uses less digits than its factorization.

537520993218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 537520993218 in words is "five hundred thirty-seven billion, five hundred twenty million, nine hundred ninety-three thousand, two hundred eighteen".