7352721216 has 168 divisors, whose sum is σ = 21927234784. Its totient is φ = 2442908160.

The previous prime is 7352721209. The next prime is 7352721223. The reversal of 7352721216 is 6121272537.

7352721216 is a `hidden beast` number, since 7 + 3 + 527 + 2 + 121 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (7352721209) and next prime (7352721223).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6546831 + ... + 6547953.

Almost surely, 2^7352721216 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 7352721216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10963617392).

7352721216 is an abundant number, since it is smaller than the sum of its proper divisors (14574513568).

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

7352721216 is a wasteful number, since it uses less digits than its factorization.

7352721216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1549 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 7352721216 is about 85748.0099827395. The cubic root of 7352721216 is about 1944.5362032543.

The spelling of 7352721216 in words is "seven billion, three hundred fifty-two million, seven hundred twenty-one thousand, two hundred sixteen".