55055002780056 has 64 divisors (see below), whose sum is σ = 139149973831680. Its totient is φ = 18150259829760.

The previous prime is 55055002780051. The next prime is 55055002780061. The reversal of 55055002780056 is 65008720055055.

It is an interprime number because it is at equal distance from previous prime (55055002780051) and next prime (55055002780061).

It is a super-2 number, since 2×55055002780056² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55055002779987 and 55055002780014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55055002780051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4490200 + ... + 11413671.

It is an arithmetic number, because the mean of its divisors is an integer number (2174218341120).

Almost surely, 2^{55055002780056} is an apocalyptic number.

It is an amenable number.

55055002780056 is an abundant number, since it is smaller than the sum of its proper divisors (84094971051624).

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

55055002780056 is a wasteful number, since it uses less digits than its factorization.

55055002780056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15905464 (or 15905460 counting only the distinct ones).

The product of its (nonzero) digits is 2100000, while the sum is 48.

The spelling of 55055002780056 in words is "fifty-five trillion, fifty-five billion, two million, seven hundred eighty thousand, fifty-six".