1616554004 has 24 divisors (see below), whose sum is σ = 3225795048. Its totient is φ = 702213120.

The previous prime is 1616554003. The next prime is 1616554031. The reversal of 1616554004 is 4004556161.

It can be written as a sum of positive squares in 4 ways, for example, as 207302404 + 1409251600 = 14398^2 + 37540^2 .

It is a super-2 number, since 2×1616554004² = 5226493695696864032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616554003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913457 + ... + 915224.

It is an arithmetic number, because the mean of its divisors is an integer number (134408127).

Almost surely, 2^1616554004 is an apocalyptic number.

It is an amenable number.

1616554004 is a deficient number, since it is larger than the sum of its proper divisors (1609241044).

1616554004 is a wasteful number, since it uses less digits than its factorization.

1616554004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828715 (or 1828713 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1616554004 is about 40206.3925763056. The cubic root of 1616554004 is about 1173.6269469734.

The spelling of 1616554004 in words is "one billion, six hundred sixteen million, five hundred fifty-four thousand, four".