1687237130520 has 384 divisors, whose sum is σ = 5672186170560. Its totient is φ = 434759270400.

The previous prime is 1687237130477. The next prime is 1687237130543. The reversal of 1687237130520 is 250317327861.

1687237130520 is a `hidden beast` number, since 1 + 6 + 8 + 7 + 23 + 71 + 30 + 520 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 351432120 + ... + 351436920.

Almost surely, 2^{1687237130520} is an apocalyptic number.

1687237130520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1687237130520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2836093085280).

1687237130520 is an abundant number, since it is smaller than the sum of its proper divisors (3984949040040).

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

1687237130520 is a wasteful number, since it uses less digits than its factorization.

1687237130520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5147 (or 5140 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 1687237130520 in words is "one trillion, six hundred eighty-seven billion, two hundred thirty-seven million, one hundred thirty thousand, five hundred twenty".