3615220512 has 90 divisors (see below), whose sum is σ = 10641273489. Its totient is φ = 1204053120.

The previous prime is 3615220507. The next prime is 3615220513. The reversal of 3615220512 is 2150225163.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 2804337936 + 810882576 = 52956^2 + 28476^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=42516.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3615220513) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3060562 + ... + 3061742.

Almost surely, 2^3615220512 is an apocalyptic number.

3615220512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3615220512

3615220512 is an abundant number, since it is smaller than the sum of its proper divisors (7026052977).

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

3615220512 is an frugal number, since it uses more digits than its factorization.

3615220512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384 (or 1186 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 3615220512 is about 60126.7038178545. The cubic root of 3615220512 is about 1534.7757578968.

Adding to 3615220512 its reverse (2150225163), we get a palindrome (5765445675).

The spelling of 3615220512 in words is "three billion, six hundred fifteen million, two hundred twenty thousand, five hundred twelve".