616487189400 has 72 divisors (see below), whose sum is σ = 2070369483780. Its totient is φ = 164396583360.

The previous prime is 616487189369. The next prime is 616487189407. The reversal of 616487189400 is 4981784616.

616487189400 is a `hidden beast` number, since 6 + 16 + 48 + 7 + 189 + 400 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×616487189400² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616487189407) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 171244642 + ... + 171248241.

Almost surely, 2^616487189400 is an apocalyptic number.

616487189400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

616487189400 is an abundant number, since it is smaller than the sum of its proper divisors (1453882294380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

616487189400 is a wasteful number, since it uses less digits than its factorization.

616487189400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342492905 (or 342492893 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 616487189400 in words is "six hundred sixteen billion, four hundred eighty-seven million, one hundred eighty-nine thousand, four hundred".