7150721652 has 36 divisors (see below), whose sum is σ = 18103692516. Its totient is φ = 2379847680.

The previous prime is 7150721651. The next prime is 7150721653. The reversal of 7150721652 is 2561270517.

7150721652 is a `hidden beast` number, since 71 + 507 + 21 + 65 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (7150721651) and next prime (7150721653).

It can be written as a sum of positive squares in 2 ways, for example, as 4484445156 + 2666276496 = 66966^2 + 51636^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×7150721652² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7150721651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131863 + ... + 178014.

Almost surely, 2^7150721652 is an apocalyptic number.

It is an amenable number.

7150721652 is an abundant number, since it is smaller than the sum of its proper divisors (10952970864).

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

7150721652 is a wasteful number, since it uses less digits than its factorization.

7150721652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310528 (or 310523 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 7150721652 is about 84561.9397365032. The cubic root of 7150721652 is about 1926.5633358268.

The spelling of 7150721652 in words is "seven billion, one hundred fifty million, seven hundred twenty-one thousand, six hundred fifty-two".