7821624065388 has 96 divisors (see below), whose sum is σ = 21368761075200. Its totient is φ = 2180001461760.

The previous prime is 7821624065383. The next prime is 7821624065393. The reversal of 7821624065388 is 8835604261287.

It is an interprime number because it is at equal distance from previous prime (7821624065383) and next prime (7821624065393).

It is a super-2 number, since 2×7821624065388² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7821624065383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32076495 + ... + 32319417.

It is an arithmetic number, because the mean of its divisors is an integer number (222591261200).

Almost surely, 2^{7821624065388} 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 7821624065388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10684380537600).

7821624065388 is an abundant number, since it is smaller than the sum of its proper divisors (13547137009812).

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

7821624065388 is a wasteful number, since it uses less digits than its factorization.

7821624065388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252327 (or 252325 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 60.

The spelling of 7821624065388 in words is "seven trillion, eight hundred twenty-one billion, six hundred twenty-four million, sixty-five thousand, three hundred eighty-eight".