5191778916 has 45 divisors (see below), whose sum is σ = 13575727011. Its totient is φ = 1730160648.

The previous prime is 5191778897. The next prime is 5191778939. The reversal of 5191778916 is 6198771915.

The square root of 5191778916 is 72054.

It is a perfect power (a square), and thus also a powerful number.

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 14 ways as a sum of consecutive naturals, for example, 1294971 + ... + 1298973.

Almost surely, 2^5191778916 is an apocalyptic number.

5191778916 is the 72054-th square number.

It is an amenable number.

5191778916 is an abundant number, since it is smaller than the sum of its proper divisors (8383948095).

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

5191778916 is an frugal number, since it uses more digits than its factorization.

5191778916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8022 (or 4008 counting only the distinct ones).

The product of its digits is 952560, while the sum is 54.

The cubic root of 5191778916 is about 1731.5647259784.

The spelling of 5191778916 in words is "five billion, one hundred ninety-one million, seven hundred seventy-eight thousand, nine hundred sixteen".