61890202859520 has 576 divisors, whose sum is σ = 231291931852800. Its totient is φ = 14087060520960.

The previous prime is 61890202859489. The next prime is 61890202859579. The reversal of 61890202859520 is 2595820209816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 359675905 + ... + 359847935.

It is an arithmetic number, because the mean of its divisors is an integer number (401548492800).

Almost surely, 2^{61890202859520} is an apocalyptic number.

61890202859520 is a gapful number since it is divisible by the number (60) 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 61890202859520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115645965926400).

61890202859520 is an abundant number, since it is smaller than the sum of its proper divisors (169401728993280).

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

61890202859520 is a wasteful number, since it uses less digits than its factorization.

61890202859520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172314 (or 172287 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 57.

The spelling of 61890202859520 in words is "sixty-one trillion, eight hundred ninety billion, two hundred two million, eight hundred fifty-nine thousand, five hundred twenty".