253781616 has 40 divisors (see below), whose sum is σ = 715204224. Its totient is φ = 76903360.

The previous prime is 253781603. The next prime is 253781621. The reversal of 253781616 is 616187352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239796 + ... + 240851.

Almost surely, 2^253781616 is an apocalyptic number.

It is an amenable number.

253781616 is an abundant number, since it is smaller than the sum of its proper divisors (461422608).

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

253781616 is a wasteful number, since it uses less digits than its factorization.

253781616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480669 (or 480663 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 253781616 is about 15930.5246617932. The cubic root of 253781616 is about 633.1210009047.

The spelling of 253781616 in words is "two hundred fifty-three million, seven hundred eighty-one thousand, six hundred sixteen".