616620252 has 12 divisors (see below), whose sum is σ = 1438780616. Its totient is φ = 205540080.

The previous prime is 616620247. The next prime is 616620341. The reversal of 616620252 is 252026616.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 25692499 + ... + 25692522.

Almost surely, 2^616620252 is an apocalyptic number.

It is an amenable number.

616620252 is an abundant number, since it is smaller than the sum of its proper divisors (822160364).

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

616620252 is a wasteful number, since it uses less digits than its factorization.

616620252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51385028 (or 51385026 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 616620252 is about 24831.8394807956. The cubic root of 616620252 is about 851.1496563417.

Adding to 616620252 its reverse (252026616), we get a palindrome (868646868).

The spelling of 616620252 in words is "six hundred sixteen million, six hundred twenty thousand, two hundred fifty-two".