16121522907 has 40 divisors (see below), whose sum is σ = 28472268000. Its totient is φ = 8894624256.

The previous prime is 16121522873. The next prime is 16121522927. The reversal of 16121522907 is 70922512161.

16121522907 is a `hidden beast` number, since 1 + 6 + 121 + 522 + 9 + 0 + 7 = 666.

It is not a de Polignac number, because 16121522907 - 2¹¹ = 16121520859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16121522927) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 473782 + ... + 506667.

It is an arithmetic number, because the mean of its divisors is an integer number (711806700).

Almost surely, 2^16121522907 is an apocalyptic number.

16121522907 is a deficient number, since it is larger than the sum of its proper divisors (12350745093).

16121522907 is an equidigital number, since it uses as much as digits as its factorization.

16121522907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980497 (or 980488 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 16121522907 in words is "sixteen billion, one hundred twenty-one million, five hundred twenty-two thousand, nine hundred seven".