16504644534 has 32 divisors (see below), whose sum is σ = 37766582016. Its totient is φ = 4710402720.

The previous prime is 16504644521. The next prime is 16504644547. The reversal of 16504644534 is 43544640561.

It is an interprime number because it is at equal distance from previous prime (16504644521) and next prime (16504644547).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178537 + ... + 254724.

It is an arithmetic number, because the mean of its divisors is an integer number (1180205688).

Almost surely, 2^16504644534 is an apocalyptic number.

16504644534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16504644534 is an abundant number, since it is smaller than the sum of its proper divisors (21261937482).

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

16504644534 is a wasteful number, since it uses less digits than its factorization.

16504644534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434180.

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 16504644534 in words is "sixteen billion, five hundred four million, six hundred forty-four thousand, five hundred thirty-four".