1616720494 has 16 divisors (see below), whose sum is σ = 2506415616. Its totient is φ = 781313400.

The previous prime is 1616720473. The next prime is 1616720509. The reversal of 1616720494 is 4940276161.

It is a super-2 number, since 2×1616720494² = 5227570311439208072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35509 + ... + 67039.

It is an arithmetic number, because the mean of its divisors is an integer number (156650976).

Almost surely, 2^1616720494 is an apocalyptic number.

1616720494 is a deficient number, since it is larger than the sum of its proper divisors (889695122).

1616720494 is a wasteful number, since it uses less digits than its factorization.

1616720494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32391.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 1616720494 is about 40208.4629649033. The cubic root of 1616720494 is about 1173.6672364704.

The spelling of 1616720494 in words is "one billion, six hundred sixteen million, seven hundred twenty thousand, four hundred ninety-four".