16464045780 has 144 divisors (see below), whose sum is σ = 61465832064. Its totient is φ = 3473729280.

The previous prime is 16464045749. The next prime is 16464045803. The reversal of 16464045780 is 8754046461.

16464045780 is a `hidden beast` number, since 1 + 64 + 64 + 0 + 457 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 486186 + ... + 518945.

It is an arithmetic number, because the mean of its divisors is an integer number (426846056).

Almost surely, 2^16464045780 is an apocalyptic number.

16464045780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16464045780 is an abundant number, since it is smaller than the sum of its proper divisors (45001786284).

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

16464045780 is a wasteful number, since it uses less digits than its factorization.

16464045780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005166 (or 1005161 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 16464045780 in words is "sixteen billion, four hundred sixty-four million, forty-five thousand, seven hundred eighty".