615640452 has 48 divisors (see below), whose sum is σ = 1653550080. Its totient is φ = 174628512.

The previous prime is 615640433. The next prime is 615640453. The reversal of 615640452 is 254046516.

It is a super-2 number, since 2×615640452² = 758026332277528608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (615640453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14688 + ... + 38039.

It is an arithmetic number, because the mean of its divisors is an integer number (34448960).

Almost surely, 2^615640452 is an apocalyptic number.

It is an amenable number.

615640452 is an abundant number, since it is smaller than the sum of its proper divisors (1037909628).

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

615640452 is a wasteful number, since it uses less digits than its factorization.

615640452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52880 (or 52878 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 615640452 is about 24812.1029338506. The cubic root of 615640452 is about 850.6985961549.

Adding to 615640452 its reverse (254046516), we get a palindrome (869686968).

The spelling of 615640452 in words is "six hundred fifteen million, six hundred forty thousand, four hundred fifty-two".