161753031000 has 640 divisors, whose sum is σ = 619736832000. Its totient is φ = 39027744000.

The previous prime is 161753030987. The next prime is 161753031029. The reversal of 161753031000 is 130357161.

161753031000 is a `hidden beast` number, since 1 + 617 + 5 + 30 + 3 + 10 + 0 + 0 = 666.

It is a super-2 number, since 2×161753031000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 337688761 + ... + 337689239.

It is an arithmetic number, because the mean of its divisors is an integer number (968338800).

Almost surely, 2^161753031000 is an apocalyptic number.

161753031000 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 161753031000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309868416000).

161753031000 is an abundant number, since it is smaller than the sum of its proper divisors (457983801000).

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

161753031000 is a wasteful number, since it uses less digits than its factorization.

161753031000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

Adding to 161753031000 its reverse (130357161), we get a palindrome (161883388161).

The spelling of 161753031000 in words is "one hundred sixty-one billion, seven hundred fifty-three million, thirty-one thousand".