16451644450 has 24 divisors (see below), whose sum is σ = 30604572432. Its totient is φ = 6579687120.

The previous prime is 16451644439. The next prime is 16451644457. The reversal of 16451644450 is 5444615461.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16451644457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387157 + ... + 427543.

It is an arithmetic number, because the mean of its divisors is an integer number (1275190518).

Almost surely, 2^16451644450 is an apocalyptic number.

16451644450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16451644450 is a deficient number, since it is larger than the sum of its proper divisors (14152927982).

16451644450 is a wasteful number, since it uses less digits than its factorization.

16451644450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48546 (or 48541 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 16451644450 in words is "sixteen billion, four hundred fifty-one million, six hundred forty-four thousand, four hundred fifty".