1616481247 has 4 divisors (see below), whose sum is σ = 1616579920. Its totient is φ = 1616382576.

The previous prime is 1616481169. The next prime is 1616481277. The reversal of 1616481247 is 7421846161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1616481247 is a prime.

It is a super-2 number, since 2×1616481247² = 5226023243805350018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616481277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18222 + ... + 59707.

It is an arithmetic number, because the mean of its divisors is an integer number (404144980).

Almost surely, 2^1616481247 is an apocalyptic number.

1616481247 is a deficient number, since it is larger than the sum of its proper divisors (98673).

1616481247 is an equidigital number, since it uses as much as digits as its factorization.

1616481247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98672.

The product of its digits is 64512, while the sum is 40.

The square root of 1616481247 is about 40205.4877721935. The cubic root of 1616481247 is about 1173.6093393841.

The spelling of 1616481247 in words is "one billion, six hundred sixteen million, four hundred eighty-one thousand, two hundred forty-seven".