2117407481856 has 112 divisors (see below), whose sum is σ = 6273417679200. Its totient is φ = 705802420224.

The previous prime is 2117407481831. The next prime is 2117407481857. The reversal of 2117407481856 is 6581847047112.

It is a happy number.

2117407481856 is a `hidden beast` number, since 2 + 1 + 17 + 407 + 48 + 185 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2117407481857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4565346 + ... + 5007713.

It is an arithmetic number, because the mean of its divisors is an integer number (56012657850).

Almost surely, 2^{2117407481856} is an apocalyptic number.

It is an amenable number.

2117407481856 is an abundant number, since it is smaller than the sum of its proper divisors (4156010197344).

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

2117407481856 is an frugal number, since it uses more digits than its factorization.

2117407481856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9573094 (or 9573064 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 2117407481856 in words is "two trillion, one hundred seventeen billion, four hundred seven million, four hundred eighty-one thousand, eight hundred fifty-six".