3651540520 has 32 divisors (see below), whose sum is σ = 8350659720. Its totient is φ = 1436670720.

The previous prime is 3651540493. The next prime is 3651540533. The reversal of 3651540520 is 250451563.

It can be written as a sum of positive squares in 4 ways, for example, as 3045494596 + 606045924 = 55186^2 + 24618^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745827 + ... + 750706.

Almost surely, 2^3651540520 is an apocalyptic number.

It is an amenable number.

3651540520 is an abundant number, since it is smaller than the sum of its proper divisors (4699119200).

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

3651540520 is a wasteful number, since it uses less digits than its factorization.

3651540520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496605 (or 1496601 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 3651540520 is about 60427.9779572343. The cubic root of 3651540520 is about 1539.8983066598.

The spelling of 3651540520 in words is "three billion, six hundred fifty-one million, five hundred forty thousand, five hundred twenty".