161806828749410 has 64 divisors (see below), whose sum is σ = 320674675507200. Its totient is φ = 58409965811712.

The previous prime is 161806828749373. The next prime is 161806828749509. The reversal of 161806828749410 is 14947828608161.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a Curzon number.

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, 8576930 + ... + 19929309.

It is an arithmetic number, because the mean of its divisors is an integer number (5010541804800).

Almost surely, 2^{161806828749410} is an apocalyptic number.

161806828749410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161806828749410 is a deficient number, since it is larger than the sum of its proper divisors (158867846757790).

161806828749410 is a wasteful number, since it uses less digits than its factorization.

161806828749410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28507235.

The product of its (nonzero) digits is 37158912, while the sum is 65.

The spelling of 161806828749410 in words is "one hundred sixty-one trillion, eight hundred six billion, eight hundred twenty-eight million, seven hundred forty-nine thousand, four hundred ten".