551671620516 has 27 divisors (see below), whose sum is σ = 1394514528043. Its totient is φ = 183889054680.

The previous prime is 551671620431. The next prime is 551671620581. The reversal of 551671620516 is 615026176155.

It is a happy number.

The square root of 551671620516 is 742746.

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

551671620516 is a `hidden beast` number, since 5 + 5 + 1 + 6 + 7 + 1 + 620 + 5 + 16 = 666.

It is a Duffinian number.

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, 4394581 + ... + 4518371.

Almost surely, 2^551671620516 is an apocalyptic number.

551671620516 is the 742746-th square number.

It is an amenable number.

551671620516 is an abundant number, since it is smaller than the sum of its proper divisors (842842907527).

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

551671620516 is an frugal number, since it uses more digits than its factorization.

551671620516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247592 (or 123796 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 551671620516 in words is "five hundred fifty-one billion, six hundred seventy-one million, six hundred twenty thousand, five hundred sixteen".