7981551626896 has 15 divisors (see below), whose sum is σ = 15464278172163. Its totient is φ = 3990770163120.

The previous prime is 7981551626863. The next prime is 7981551626897. The reversal of 7981551626896 is 6986261551897.

The square root of 7981551626896 is 2825164.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7981551626897) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10947511 + ... + 11653801.

Almost surely, 2^{7981551626896} is an apocalyptic number.

7981551626896 is the 2825164-th square number.

It is an amenable number.

7981551626896 is a deficient number, since it is larger than the sum of its proper divisors (7482726545267).

7981551626896 is an frugal number, since it uses more digits than its factorization.

7981551626896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412590 (or 706293 counting only the distinct ones).

The product of its digits is 391910400, while the sum is 73.

The spelling of 7981551626896 in words is "seven trillion, nine hundred eighty-one billion, five hundred fifty-one million, six hundred twenty-six thousand, eight hundred ninety-six".