161955031630 has 16 divisors (see below), whose sum is σ = 333164636640. Its totient is φ = 55527439392.

The previous prime is 161955031619. The next prime is 161955031633. The reversal of 161955031630 is 36130559161.

161955031630 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161955031633) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1156821585 + ... + 1156821724.

It is an arithmetic number, because the mean of its divisors is an integer number (20822789790).

Almost surely, 2^161955031630 is an apocalyptic number.

161955031630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161955031630 is an abundant number, since it is smaller than the sum of its proper divisors (171209605010).

161955031630 is a wasteful number, since it uses less digits than its factorization.

161955031630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313643323.

The product of its (nonzero) digits is 72900, while the sum is 40.

The spelling of 161955031630 in words is "one hundred sixty-one billion, nine hundred fifty-five million, thirty-one thousand, six hundred thirty".