7478674457640 has 256 divisors, whose sum is σ = 23994635857920. Its totient is φ = 1858141409280.

The previous prime is 7478674457633. The next prime is 7478674457647. The reversal of 7478674457640 is 467544768747.

It is an interprime number because it is at equal distance from previous prime (7478674457633) and next prime (7478674457647).

It is not an unprimeable number, because it can be changed into a prime (7478674457647) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1023490867 + ... + 1023498173.

It is an arithmetic number, because the mean of its divisors is an integer number (93729046320).

Almost surely, 2^{7478674457640} 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 7478674457640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11997317928960).

7478674457640 is an abundant number, since it is smaller than the sum of its proper divisors (16515961400280).

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

7478674457640 is a wasteful number, since it uses less digits than its factorization.

7478674457640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12312 (or 12308 counting only the distinct ones).

The product of its (nonzero) digits is 885104640, while the sum is 69.

The spelling of 7478674457640 in words is "seven trillion, four hundred seventy-eight billion, six hundred seventy-four million, four hundred fifty-seven thousand, six hundred forty".