161048251820 has 48 divisors (see below), whose sum is σ = 356172768000. Its totient is φ = 60999433920.

The previous prime is 161048251799. The next prime is 161048251831. The reversal of 161048251820 is 28152840161.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 696665 + ... + 898575.

It is an arithmetic number, because the mean of its divisors is an integer number (7420266000).

Almost surely, 2^161048251820 is an apocalyptic number.

161048251820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161048251820 is an abundant number, since it is smaller than the sum of its proper divisors (195124516180).

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

161048251820 is a wasteful number, since it uses less digits than its factorization.

161048251820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204038 (or 204036 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The spelling of 161048251820 in words is "one hundred sixty-one billion, forty-eight million, two hundred fifty-one thousand, eight hundred twenty".