1511985132 has 144 divisors (see below), whose sum is σ = 4576965120. Its totient is φ = 411485184.

The previous prime is 1511985119. The next prime is 1511985143. The reversal of 1511985132 is 2315891151.

1511985132 is a `hidden beast` number, since 1 + 51 + 1 + 98 + 513 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2045619 + ... + 2046357.

It is an arithmetic number, because the mean of its divisors is an integer number (31784480).

Almost surely, 2^1511985132 is an apocalyptic number.

1511985132 is a gapful number since it is divisible by the number (12) 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 1511985132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2288482560).

1511985132 is an abundant number, since it is smaller than the sum of its proper divisors (3064979988).

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

1511985132 is a wasteful number, since it uses less digits than its factorization.

1511985132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1127 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The square root of 1511985132 is about 38884.2530081266. The cubic root of 1511985132 is about 1147.7549475531.

The spelling of 1511985132 in words is "one billion, five hundred eleven million, nine hundred eighty-five thousand, one hundred thirty-two".