616257687 has 8 divisors (see below), whose sum is σ = 824581504. Its totient is φ = 409386168.

The previous prime is 616257683. The next prime is 616257703. The reversal of 616257687 is 786752616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 616257687 - 2² = 616257683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616257683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362083 + ... + 363780.

It is an arithmetic number, because the mean of its divisors is an integer number (103072688).

Almost surely, 2^616257687 is an apocalyptic number.

616257687 is a deficient number, since it is larger than the sum of its proper divisors (208323817).

616257687 is a wasteful number, since it uses less digits than its factorization.

616257687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726149.

The product of its digits is 846720, while the sum is 48.

The square root of 616257687 is about 24824.5380017434. The cubic root of 616257687 is about 850.9828018487.

The spelling of 616257687 in words is "six hundred sixteen million, two hundred fifty-seven thousand, six hundred eighty-seven".