7921695621120 has 1024 divisors, whose sum is σ = 28965673094400. Its totient is φ = 1836098519040.

The previous prime is 7921695621109. The next prime is 7921695621163. The reversal of 7921695621120 is 211265961297.

It is a tau number, because it is divible by the number of its divisors (1024).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6509198752 + ... + 6509199968.

Almost surely, 2^{7921695621120} 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 7921695621120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14482836547200).

7921695621120 is an abundant number, since it is smaller than the sum of its proper divisors (21043977473280).

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

7921695621120 is a wasteful number, since it uses less digits than its factorization.

7921695621120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1304 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 7921695621120 in words is "seven trillion, nine hundred twenty-one billion, six hundred ninety-five million, six hundred twenty-one thousand, one hundred twenty".