161451400 has 48 divisors (see below), whose sum is σ = 409505040. Its totient is φ = 58708800.

The previous prime is 161451383. The next prime is 161451413. The reversal of 161451400 is 4154161.

161451400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34494 + ... + 38893.

It is an arithmetic number, because the mean of its divisors is an integer number (8531355).

Almost surely, 2^161451400 is an apocalyptic number.

161451400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161451400 is an abundant number, since it is smaller than the sum of its proper divisors (248053640).

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

161451400 is a wasteful number, since it uses less digits than its factorization.

161451400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73414 (or 73405 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 161451400 is about 12706.3527418374. The cubic root of 161451400 is about 544.5201286181.

The spelling of 161451400 in words is "one hundred sixty-one million, four hundred fifty-one thousand, four hundred".