3640521510 has 96 divisors (see below), whose sum is σ = 9875803392. Its totient is φ = 964884960.

The previous prime is 3640521497. The next prime is 3640521517. The reversal of 3640521510 is 151250463.

3640521510 is a `hidden beast` number, since 3 + 640 + 5 + 2 + 1 + 5 + 10 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640521517) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 401325 + ... + 410295.

It is an arithmetic number, because the mean of its divisors is an integer number (102872952).

Almost surely, 2^3640521510 is an apocalyptic number.

3640521510 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3640521510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4937901696).

3640521510 is an abundant number, since it is smaller than the sum of its proper divisors (6235281882).

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

3640521510 is a wasteful number, since it uses less digits than its factorization.

3640521510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9160 (or 9148 counting only the distinct ones).

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

The square root of 3640521510 is about 60336.7343332401. The cubic root of 3640521510 is about 1538.3477965570.

Adding to 3640521510 its reverse (151250463), we get a palindrome (3791771973).

The spelling of 3640521510 in words is "three billion, six hundred forty million, five hundred twenty-one thousand, five hundred ten".