1871121516 has 48 divisors (see below), whose sum is σ = 4843601280. Its totient is φ = 557393920.

The previous prime is 1871121491. The next prime is 1871121521. The reversal of 1871121516 is 6151211781.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112341 + ... + 127916.

It is an arithmetic number, because the mean of its divisors is an integer number (100908360).

Almost surely, 2^1871121516 is an apocalyptic number.

It is an amenable number.

1871121516 is an abundant number, since it is smaller than the sum of its proper divisors (2972479764).

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

1871121516 is a wasteful number, since it uses less digits than its factorization.

1871121516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240334 (or 240332 counting only the distinct ones).

The product of its digits is 3360, while the sum is 33.

The square root of 1871121516 is about 43256.4621299523. The cubic root of 1871121516 is about 1232.2552134390.

The spelling of 1871121516 in words is "one billion, eight hundred seventy-one million, one hundred twenty-one thousand, five hundred sixteen".