16521515070 has 64 divisors (see below), whose sum is σ = 39956716800. Its totient is φ = 4371971328.

The previous prime is 16521515041. The next prime is 16521515071. The reversal of 16521515070 is 7051512561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16521515071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2142081 + ... + 2149779.

It is an arithmetic number, because the mean of its divisors is an integer number (624323700).

Almost surely, 2^16521515070 is an apocalyptic number.

16521515070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16521515070 is an abundant number, since it is smaller than the sum of its proper divisors (23435201730).

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

16521515070 is a wasteful number, since it uses less digits than its factorization.

16521515070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8249.

The product of its (nonzero) digits is 10500, while the sum is 33.

The spelling of 16521515070 in words is "sixteen billion, five hundred twenty-one million, five hundred fifteen thousand, seventy".