16025121651 has 24 divisors (see below), whose sum is σ = 27114865344. Its totient is φ = 8324737680.

The previous prime is 16025121649. The next prime is 16025121659. The reversal of 16025121651 is 15612152061.

It is not a de Polignac number, because 16025121651 - 2¹ = 16025121649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16025121659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4953585 + ... + 4956818.

It is an arithmetic number, because the mean of its divisors is an integer number (1129786056).

Almost surely, 2^16025121651 is an apocalyptic number.

16025121651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16025121651 is a deficient number, since it is larger than the sum of its proper divisors (11089743693).

16025121651 is a wasteful number, since it uses less digits than its factorization.

16025121651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9910431 (or 9910424 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The spelling of 16025121651 in words is "sixteen billion, twenty-five million, one hundred twenty-one thousand, six hundred fifty-one".