7640657213440 has 192 divisors, whose sum is σ = 19492170778080. Its totient is φ = 2864531374080.

The previous prime is 7640657213429. The next prime is 7640657213467. The reversal of 7640657213440 is 443127560467.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41862219 + ... + 42044341.

Almost surely, 2^{7640657213440} 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 7640657213440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9746085389040).

7640657213440 is an abundant number, since it is smaller than the sum of its proper divisors (11851513564640).

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

7640657213440 is a wasteful number, since it uses less digits than its factorization.

7640657213440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182408 (or 182388 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 49.

The spelling of 7640657213440 in words is "seven trillion, six hundred forty billion, six hundred fifty-seven million, two hundred thirteen thousand, four hundred forty".