7040000400640 has 72 divisors (see below), whose sum is σ = 16868085782688. Its totient is φ = 2815151032320.

The previous prime is 7040000400599. The next prime is 7040000400661. The reversal of 7040000400640 is 460040000407.

It is a happy number.

It is a super-2 number, since 2×7040000400640² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3425875 + ... + 5081005.

It is an arithmetic number, because the mean of its divisors is an integer number (234278969204).

Almost surely, 2^{7040000400640} is an apocalyptic number.

It is an amenable number.

7040000400640 is an abundant number, since it is smaller than the sum of its proper divisors (9828085382048).

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

7040000400640 is a wasteful number, since it uses less digits than its factorization.

7040000400640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658475 (or 1658461 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The spelling of 7040000400640 in words is "seven trillion, forty billion, four hundred thousand, six hundred forty".