7155521612 has 48 divisors (see below), whose sum is σ = 13803995520. Its totient is φ = 3231332352.

The previous prime is 7155521609. The next prime is 7155521699. The reversal of 7155521612 is 2161255517.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164189 + ... + 203147.

It is an arithmetic number, because the mean of its divisors is an integer number (287583240).

Almost surely, 2^7155521612 is an apocalyptic number.

It is an amenable number.

7155521612 is a deficient number, since it is larger than the sum of its proper divisors (6648473908).

7155521612 is a wasteful number, since it uses less digits than its factorization.

7155521612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39090 (or 39088 counting only the distinct ones).

The product of its digits is 21000, while the sum is 35.

The square root of 7155521612 is about 84590.3163015720. The cubic root of 7155521612 is about 1926.9943113769.

The spelling of 7155521612 in words is "seven billion, one hundred fifty-five million, five hundred twenty-one thousand, six hundred twelve".