55820320768 has 32 divisors (see below), whose sum is σ = 111639003570. Its totient is φ = 27910144000.

The previous prime is 55820320733. The next prime is 55820320783. The reversal of 55820320768 is 86702302855.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40436383744 + 15383937024 = 201088^2 + 124032^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 818983 + ... + 884518.

Almost surely, 2^55820320768 is an apocalyptic number.

It is an amenable number.

55820320768 is a deficient number, since it is larger than the sum of its proper divisors (55818682802).

55820320768 is an frugal number, since it uses more digits than its factorization.

55820320768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703531 (or 1703503 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 55820320768 in words is "fifty-five billion, eight hundred twenty million, three hundred twenty thousand, seven hundred sixty-eight".