3640514540 has 48 divisors (see below), whose sum is σ = 8278757760. Its totient is φ = 1336746240.

The previous prime is 3640514539. The next prime is 3640514561. The reversal of 3640514540 is 454150463.

It is a super-2 number, since 2×3640514540² = 26506692231902823200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3640514497 and 3640514506.

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, 8381 + ... + 85739.

It is an arithmetic number, because the mean of its divisors is an integer number (172474120).

Almost surely, 2^3640514540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3640514540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4139378880).

3640514540 is an abundant number, since it is smaller than the sum of its proper divisors (4638243220).

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

3640514540 is a wasteful number, since it uses less digits than its factorization.

3640514540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77562 (or 77560 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 3640514540 is about 60336.6765740375. The cubic root of 3640514540 is about 1538.3468148029.

The spelling of 3640514540 in words is "three billion, six hundred forty million, five hundred fourteen thousand, five hundred forty".