7215666167808 has 1280 divisors, whose sum is σ = 26414023680000. Its totient is φ = 1926317998080.

The previous prime is 7215666167771. The next prime is 7215666167861. The reversal of 7215666167808 is 8087616665127.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nialpdrome in base 12.

It is a congruent number.

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, 232763424753 + ... + 232763424783.

It is an arithmetic number, because the mean of its divisors is an integer number (20635956000).

Almost surely, 2^{7215666167808} 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 7215666167808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13207011840000).

7215666167808 is an abundant number, since it is smaller than the sum of its proper divisors (19198357512192).

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

7215666167808 is an frugal number, since it uses more digits than its factorization.

7215666167808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 63.

The spelling of 7215666167808 in words is "seven trillion, two hundred fifteen billion, six hundred sixty-six million, one hundred sixty-seven thousand, eight hundred eight".