55208716290 has 640 divisors, whose sum is σ = 195148800000. Its totient is φ = 10873833984.

The previous prime is 55208716267. The next prime is 55208716291. The reversal of 55208716290 is 9261780255.

55208716290 is a `hidden beast` number, since 552 + 0 + 8 + 7 + 1 + 6 + 2 + 90 = 666.

It is a super-2 number, since 2×55208716290² (a number of 22 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (55208716291) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 110638461 + ... + 110638959.

It is an arithmetic number, because the mean of its divisors is an integer number (304920000).

Almost surely, 2^55208716290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55208716290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97574400000).

55208716290 is an abundant number, since it is smaller than the sum of its proper divisors (139940083710).

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

55208716290 is a wasteful number, since it uses less digits than its factorization.

55208716290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 55208716290 in words is "fifty-five billion, two hundred eight million, seven hundred sixteen thousand, two hundred ninety".