7816103066520 has 384 divisors, whose sum is σ = 30389995238400. Its totient is φ = 1781665466112.

The previous prime is 7816103066509. The next prime is 7816103066549. The reversal of 7816103066520 is 256603016187.

7816103066520 is a `hidden beast` number, since 7 + 8 + 1 + 61 + 0 + 3 + 0 + 66 + 520 = 666.

It is a super-2 number, since 2×7816103066520² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19220419 + ... + 19622861.

It is an arithmetic number, because the mean of its divisors is an integer number (79140612600).

Almost surely, 2^{7816103066520} is an apocalyptic number.

7816103066520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7816103066520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15194997619200).

7816103066520 is an abundant number, since it is smaller than the sum of its proper divisors (22573892171880).

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

7816103066520 is a wasteful number, since it uses less digits than its factorization.

7816103066520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402844 (or 402827 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 7816103066520 in words is "seven trillion, eight hundred sixteen billion, one hundred three million, sixty-six thousand, five hundred twenty".