55211966550 has 96 divisors (see below), whose sum is σ = 163842742560. Its totient is φ = 13590633600.

The previous prime is 55211966533. The next prime is 55211966561. The reversal of 55211966550 is 5566911255.

55211966550 is a `hidden beast` number, since 5 + 5 + 2 + 1 + 1 + 96 + 6 + 550 = 666.

55211966550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55211966550² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 55211966496 and 55211966505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1555441 + ... + 1590540.

It is an arithmetic number, because the mean of its divisors is an integer number (1706695235).

Almost surely, 2^55211966550 is an apocalyptic number.

55211966550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55211966550 is an abundant number, since it is smaller than the sum of its proper divisors (108630776010).

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

55211966550 is a wasteful number, since it uses less digits than its factorization.

55211966550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146015 (or 3146004 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 45.

The spelling of 55211966550 in words is "fifty-five billion, two hundred eleven million, nine hundred sixty-six thousand, five hundred fifty".