7245404002640 has 20 divisors (see below), whose sum is σ = 16845564306324. Its totient is φ = 2898161601024.

The previous prime is 7245404002621. The next prime is 7245404002679. The reversal of 7245404002640 is 462004045427.

It can be written as a sum of positive squares in 2 ways, for example, as 5070026795584 + 2175377207056 = 2251672^2 + 1474916^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×7245404002640² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7245404002594 and 7245404002603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45283774937 + ... + 45283775096.

Almost surely, 2^{7245404002640} is an apocalyptic number.

It is an amenable number.

7245404002640 is an abundant number, since it is smaller than the sum of its proper divisors (9600160303684).

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

7245404002640 is a wasteful number, since it uses less digits than its factorization.

7245404002640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90567550046 (or 90567550040 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 38.

The spelling of 7245404002640 in words is "seven trillion, two hundred forty-five billion, four hundred four million, two thousand, six hundred forty".