161005551210 has 96 divisors (see below), whose sum is σ = 478490343552. Its totient is φ = 36795588480.

The previous prime is 161005551131. The next prime is 161005551271. The reversal of 161005551210 is 12155500161.

161005551210 is a `hidden beast` number, since 1 + 6 + 100 + 5 + 551 + 2 + 1 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5132092 + ... + 5163368.

It is an arithmetic number, because the mean of its divisors is an integer number (4984274412).

Almost surely, 2^161005551210 is an apocalyptic number.

161005551210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161005551210 is an abundant number, since it is smaller than the sum of its proper divisors (317484792342).

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

161005551210 is a wasteful number, since it uses less digits than its factorization.

161005551210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39468 (or 39465 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The spelling of 161005551210 in words is "one hundred sixty-one billion, five million, five hundred fifty-one thousand, two hundred ten".