616138252 has 12 divisors (see below), whose sum is σ = 1078591696. Its totient is φ = 307969200.

The previous prime is 616138223. The next prime is 616138291. The reversal of 616138252 is 252831616.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10128 + ... + 36535.

Almost surely, 2^616138252 is an apocalyptic number.

It is an amenable number.

616138252 is a deficient number, since it is larger than the sum of its proper divisors (462453444).

616138252 is a wasteful number, since it uses less digits than its factorization.

616138252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49968 (or 49966 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 616138252 is about 24822.1323016376. The cubic root of 616138252 is about 850.9278228468.

Adding to 616138252 its reverse (252831616), we get a palindrome (868969868).

The spelling of 616138252 in words is "six hundred sixteen million, one hundred thirty-eight thousand, two hundred fifty-two".