7658640193490 has 32 divisors (see below), whose sum is σ = 16195613950656. Its totient is φ = 2570732372160.

The previous prime is 7658640193489. The next prime is 7658640193493. The reversal of 7658640193490 is 943910468567.

It is a super-2 number, since 2×7658640193490² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7658640193493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2677844792 + ... + 2677847651.

It is an arithmetic number, because the mean of its divisors is an integer number (506112935958).

Almost surely, 2^{7658640193490} is an apocalyptic number.

7658640193490 is an abundant number, since it is smaller than the sum of its proper divisors (8536973757166).

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

7658640193490 is a wasteful number, since it uses less digits than its factorization.

7658640193490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355692474.

The product of its (nonzero) digits is 39191040, while the sum is 62.

The spelling of 7658640193490 in words is "seven trillion, six hundred fifty-eight billion, six hundred forty million, one hundred ninety-three thousand, four hundred ninety".