1616649803 has 8 divisors (see below), whose sum is σ = 1658089440. Its totient is φ = 1575305920.

The previous prime is 1616649791. The next prime is 1616649817. The reversal of 1616649803 is 3089466161.

It is a happy number.

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 1616649803 - 2²² = 1612455499 is a prime.

It is a super-2 number, since 2×1616649803² = 5227113171079877618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616649823) 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, 10901 + ... + 57897.

It is an arithmetic number, because the mean of its divisors is an integer number (207261180).

Almost surely, 2^1616649803 is an apocalyptic number.

1616649803 is a deficient number, since it is larger than the sum of its proper divisors (41439637).

1616649803 is an equidigital number, since it uses as much as digits as its factorization.

1616649803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47877.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 1616649803 is about 40207.5838990606. The cubic root of 1616649803 is about 1173.6501300461.

The spelling of 1616649803 in words is "one billion, six hundred sixteen million, six hundred forty-nine thousand, eight hundred three".