551321039616 has 72 divisors (see below), whose sum is σ = 1470707587440. Its totient is φ = 183349149696.

The previous prime is 551321039603. The next prime is 551321039639. The reversal of 551321039616 is 616930123155.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496401 + ... + 1161488.

It is an arithmetic number, because the mean of its divisors is an integer number (20426494270).

Almost surely, 2^551321039616 is an apocalyptic number.

It is an amenable number.

551321039616 is an abundant number, since it is smaller than the sum of its proper divisors (919386547824).

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

551321039616 is a wasteful number, since it uses less digits than its factorization.

551321039616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658341 (or 1658327 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 42.

The spelling of 551321039616 in words is "five hundred fifty-one billion, three hundred twenty-one million, thirty-nine thousand, six hundred sixteen".