161025939000 has 192 divisors, whose sum is σ = 547925040000. Its totient is φ = 42651705600.

The previous prime is 161025938989. The next prime is 161025939001. The reversal of 161025939000 is 939520161.

161025939000 is a `hidden beast` number, since 1 + 6 + 10 + 259 + 390 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161025939001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1280961 + ... + 1401039.

It is an arithmetic number, because the mean of its divisors is an integer number (2853776250).

Almost surely, 2^161025939000 is an apocalyptic number.

161025939000 is a gapful number since it is divisible by the number (10) 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 161025939000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273962520000).

161025939000 is an abundant number, since it is smaller than the sum of its proper divisors (386899101000).

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

161025939000 is a wasteful number, since it uses less digits than its factorization.

161025939000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120255 (or 120238 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The spelling of 161025939000 in words is "one hundred sixty-one billion, twenty-five million, nine hundred thirty-nine thousand".