616681457 has 8 divisors (see below), whose sum is σ = 711757632. Its totient is φ = 523350000.

The previous prime is 616681453. The next prime is 616681463. The reversal of 616681457 is 754186616.

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

It is a cyclic number.

It is not a de Polignac number, because 616681457 - 2² = 616681453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616681453) 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, 435419 + ... + 436832.

It is an arithmetic number, because the mean of its divisors is an integer number (88969704).

Almost surely, 2^616681457 is an apocalyptic number.

It is an amenable number.

616681457 is a deficient number, since it is larger than the sum of its proper divisors (95076175).

616681457 is a wasteful number, since it uses less digits than its factorization.

616681457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872359.

The product of its digits is 241920, while the sum is 44.

The square root of 616681457 is about 24833.0718397866. The cubic root of 616681457 is about 851.1778167809.

The spelling of 616681457 in words is "six hundred sixteen million, six hundred eighty-one thousand, four hundred fifty-seven".