19546276864 has 99 divisors (see below), whose sum is σ = 41669241703. Its totient is φ = 9162457088.

The previous prime is 19546276843. The next prime is 19546276879. The reversal of 19546276864 is 46867264591.

The square root of 19546276864 is 139808.

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

It can be written as a sum of positive squares in 4 ways, for example, as 13043467264 + 6502809600 = 114208^2 + 80640^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19546276799 and 19546276808.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 76055424 + ... + 76055680.

Almost surely, 2^19546276864 is an apocalyptic number.

19546276864 is the 139808-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19546276864

19546276864 is an abundant number, since it is smaller than the sum of its proper divisors (22122964839).

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

19546276864 is an frugal number, since it uses more digits than its factorization.

19546276864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568 (or 276 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 58.

The spelling of 19546276864 in words is "nineteen billion, five hundred forty-six million, two hundred seventy-six thousand, eight hundred sixty-four".