7145865216 has 540 divisors, whose sum is σ = 25640046432. Its totient is φ = 1907490816.

The previous prime is 7145865179. The next prime is 7145865229. The reversal of 7145865216 is 6125685417.

7145865216 is a `hidden beast` number, since 7 + 1 + 4 + 586 + 52 + 16 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 166182891 + ... + 166182933.

Almost surely, 2^7145865216 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 7145865216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12820023216).

7145865216 is an abundant number, since it is smaller than the sum of its proper divisors (18494181216).

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

7145865216 is a wasteful number, since it uses less digits than its factorization.

7145865216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 78 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 7145865216 is about 84533.2196003441. The cubic root of 7145865216 is about 1926.1270931229.

The spelling of 7145865216 in words is "seven billion, one hundred forty-five million, eight hundred sixty-five thousand, two hundred sixteen".