7245206640864 has 144 divisors (see below), whose sum is σ = 20976595239600. Its totient is φ = 2371734908928.

The previous prime is 7245206640811. The next prime is 7245206640911. The reversal of 7245206640864 is 4680466025427.

It is a happy number.

7245206640864 is a `hidden beast` number, since 7 + 24 + 5 + 206 + 6 + 408 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 7245206640864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2526067 + ... + 4568525.

It is an arithmetic number, because the mean of its divisors is an integer number (145670800275).

Almost surely, 2^{7245206640864} 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 7245206640864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10488297619800).

7245206640864 is an abundant number, since it is smaller than the sum of its proper divisors (13731388598736).

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

7245206640864 is a wasteful number, since it uses less digits than its factorization.

7245206640864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042697 (or 2042686 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 54.

The spelling of 7245206640864 in words is "seven trillion, two hundred forty-five billion, two hundred six million, six hundred forty thousand, eight hundred sixty-four".