1861516914 has 32 divisors (see below), whose sum is σ = 3887032320. Its totient is φ = 593202192.

The previous prime is 1861516901. The next prime is 1861516957. The reversal of 1861516914 is 4196151681.

It is a happy number.

It is a super-2 number, since 2×1861516914² = 6930490442216166792, which contains 22 as substring.

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, 454327 + ... + 458405.

It is an arithmetic number, because the mean of its divisors is an integer number (121469760).

Almost surely, 2^1861516914 is an apocalyptic number.

1861516914 is an abundant number, since it is smaller than the sum of its proper divisors (2025515406).

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

1861516914 is a wasteful number, since it uses less digits than its factorization.

1861516914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7414.

The product of its digits is 51840, while the sum is 42.

The square root of 1861516914 is about 43145.3000221345. The cubic root of 1861516914 is about 1230.1431771990.

The spelling of 1861516914 in words is "one billion, eight hundred sixty-one million, five hundred sixteen thousand, nine hundred fourteen".