204623156497920 has 320 divisors, whose sum is σ = 688670047296000. Its totient is φ = 51687799750656.

The previous prime is 204623156497873. The next prime is 204623156497951. The reversal of 204623156497920 is 29794651326402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1224039301 + ... + 1224206459.

It is an arithmetic number, because the mean of its divisors is an integer number (2152093897800).

Almost surely, 2^{204623156497920} is an apocalyptic number.

204623156497920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204623156497920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344335023648000).

204623156497920 is an abundant number, since it is smaller than the sum of its proper divisors (484046890798080).

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

204623156497920 is a wasteful number, since it uses less digits than its factorization.

204623156497920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175593 (or 175577 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 60.

The spelling of 204623156497920 in words is "two hundred four trillion, six hundred twenty-three billion, one hundred fifty-six million, four hundred ninety-seven thousand, nine hundred twenty".