7794402515640 has 384 divisors, whose sum is σ = 27574026480000. Its totient is φ = 1898027790336.

The previous prime is 7794402515633. The next prime is 7794402515663. The reversal of 7794402515640 is 465152044977.

7794402515640 is a `hidden beast` number, since 7 + 7 + 9 + 440 + 2 + 5 + 156 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 333096661 + ... + 333120059.

It is an arithmetic number, because the mean of its divisors is an integer number (71807360625).

Almost surely, 2^{7794402515640} 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 7794402515640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13787013240000).

7794402515640 is an abundant number, since it is smaller than the sum of its proper divisors (19779623964360).

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

7794402515640 is a wasteful number, since it uses less digits than its factorization.

7794402515640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24191 (or 24184 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 7794402515640 in words is "seven trillion, seven hundred ninety-four billion, four hundred two million, five hundred fifteen thousand, six hundred forty".