161051390 has 8 divisors (see below), whose sum is σ = 289892520. Its totient is φ = 64420552.

The previous prime is 161051381. The next prime is 161051393. The reversal of 161051390 is 93150161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161051393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8052560 + ... + 8052579.

It is an arithmetic number, because the mean of its divisors is an integer number (36236565).

Almost surely, 2^161051390 is an apocalyptic number.

161051390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161051390 is a deficient number, since it is larger than the sum of its proper divisors (128841130).

161051390 is a wasteful number, since it uses less digits than its factorization.

161051390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16105146.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 161051390 is about 12690.6024285689. The cubic root of 161051390 is about 544.0700579288.

The spelling of 161051390 in words is "one hundred sixty-one million, fifty-one thousand, three hundred ninety".