1951869816 has 48 divisors (see below), whose sum is σ = 5692956360. Its totient is φ = 600575040.

The previous prime is 1951869811. The next prime is 1951869823. The reversal of 1951869816 is 6189681591.

It is a super-2 number, since 2×1951869816² = 7619591557223747712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1951869811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1041730 + ... + 1043601.

Almost surely, 2^1951869816 is an apocalyptic number.

It is an amenable number.

1951869816 is an abundant number, since it is smaller than the sum of its proper divisors (3741086544).

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

1951869816 is a wasteful number, since it uses less digits than its factorization.

1951869816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085356 (or 2085349 counting only the distinct ones).

The product of its digits is 933120, while the sum is 54.

The square root of 1951869816 is about 44179.9707559885. The cubic root of 1951869816 is about 1249.7321700311.

The spelling of 1951869816 in words is "one billion, nine hundred fifty-one million, eight hundred sixty-nine thousand, eight hundred sixteen".