55787215799056 has 135 divisors (see below), whose sum is σ = 127858960581183. Its totient is φ = 23511481378560.

The previous prime is 55787215799041. The next prime is 55787215799093. The reversal of 55787215799056 is 65099751278755.

The square root of 55787215799056 is 7469084.

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 14215463715600 + 41571752083456 = 3770340^2 + 6447616^2 .

It is a super-2 number, since 2×55787215799056² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12757193286 + ... + 12757197658.

Almost surely, 2^{55787215799056} is an apocalyptic number.

55787215799056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

55787215799056 is the 7469084-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55787215799056

55787215799056 is an abundant number, since it is smaller than the sum of its proper divisors (72071744782127).

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

55787215799056 is an frugal number, since it uses more digits than its factorization.

55787215799056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8890 (or 4443 counting only the distinct ones).

The product of its (nonzero) digits is 1666980000, while the sum is 76.

The spelling of 55787215799056 in words is "fifty-five trillion, seven hundred eighty-seven billion, two hundred fifteen million, seven hundred ninety-nine thousand, fifty-six".