161400375 has 24 divisors (see below), whose sum is σ = 290953104. Its totient is φ = 86079600.

The previous prime is 161400373. The next prime is 161400391. The reversal of 161400375 is 573004161.

It is not a de Polignac number, because 161400375 - 2¹ = 161400373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161400373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70609 + ... + 72858.

It is an arithmetic number, because the mean of its divisors is an integer number (12123046).

Almost surely, 2^161400375 is an apocalyptic number.

161400375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161400375 is a deficient number, since it is larger than the sum of its proper divisors (129552729).

161400375 is a wasteful number, since it uses less digits than its factorization.

161400375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143488 (or 143475 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 161400375 is about 12704.3447292649. The cubic root of 161400375 is about 544.4627593065.

The spelling of 161400375 in words is "one hundred sixty-one million, four hundred thousand, three hundred seventy-five".