7894953561616 has 135 divisors (see below), whose sum is σ = 17750253936429. Its totient is φ = 3398729241600.

The previous prime is 7894953561587. The next prime is 7894953561617. The reversal of 7894953561616 is 6161653594987.

The square root of 7894953561616 is 2809796.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5922389491216 + 1972564070400 = 2433596^2 + 1404480^2 .

It is not an unprimeable number, because it can be changed into a prime (7894953561617) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2348987776 + ... + 2348991136.

Almost surely, 2^{7894953561616} is an apocalyptic number.

7894953561616 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

7894953561616 is the 2809796-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7894953561616

7894953561616 is an abundant number, since it is smaller than the sum of its proper divisors (9855300374813).

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

7894953561616 is an equidigital number, since it uses as much as digits as its factorization.

7894953561616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6790 (or 3393 counting only the distinct ones).

The product of its digits is 293932800, while the sum is 70.

The spelling of 7894953561616 in words is "seven trillion, eight hundred ninety-four billion, nine hundred fifty-three million, five hundred sixty-one thousand, six hundred sixteen".