1616530747 has 4 divisors (see below), whose sum is σ = 1740879280. Its totient is φ = 1492182216.

The previous prime is 1616530733. The next prime is 1616530823. The reversal of 1616530747 is 7470356161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7470356161 = 31 ⋅240979231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1616530747 is a prime.

It is a super-2 number, since 2×1616530747² = 5226343311992756018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616530717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62174247 + ... + 62174272.

It is an arithmetic number, because the mean of its divisors is an integer number (435219820).

Almost surely, 2^1616530747 is an apocalyptic number.

1616530747 is a deficient number, since it is larger than the sum of its proper divisors (124348533).

1616530747 is a wasteful number, since it uses less digits than its factorization.

1616530747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124348532.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 1616530747 is about 40206.1033550878. The cubic root of 1616530747 is about 1173.6213187105.

The spelling of 1616530747 in words is "one billion, six hundred sixteen million, five hundred thirty thousand, seven hundred forty-seven".