161968035810 has 64 divisors (see below), whose sum is σ = 444305498112. Its totient is φ = 37017072576.

The previous prime is 161968035781. The next prime is 161968035863. The reversal of 161968035810 is 18530869161.

It is a super-2 number, since 2×161968035810² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161968035810.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2054379 + ... + 2131761.

It is an arithmetic number, because the mean of its divisors is an integer number (6942273408).

Almost surely, 2^161968035810 is an apocalyptic number.

161968035810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161968035810 is an abundant number, since it is smaller than the sum of its proper divisors (282337462302).

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

161968035810 is a wasteful number, since it uses less digits than its factorization.

161968035810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87367.

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 161968035810 in words is "one hundred sixty-one billion, nine hundred sixty-eight million, thirty-five thousand, eight hundred ten".