7427047217640 has 128 divisors (see below), whose sum is σ = 22596734488320. Its totient is φ = 1952497612800.

The previous prime is 7427047217617. The next prime is 7427047217651. The reversal of 7427047217640 is 467127407247.

It is a super-2 number, since 2×7427047217640² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144141162 + ... + 144192678.

It is an arithmetic number, because the mean of its divisors is an integer number (176536988190).

Almost surely, 2^{7427047217640} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7427047217640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11298367244160).

7427047217640 is an abundant number, since it is smaller than the sum of its proper divisors (15169687270680).

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

7427047217640 is a wasteful number, since it uses less digits than its factorization.

7427047217640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68523 (or 68519 counting only the distinct ones).

The product of its (nonzero) digits is 3687936, while the sum is 51.

The spelling of 7427047217640 in words is "seven trillion, four hundred twenty-seven billion, forty-seven million, two hundred seventeen thousand, six hundred forty".