16538962251 has 16 divisors (see below), whose sum is σ = 25295234048. Its totient is φ = 9415958400.

The previous prime is 16538962217. The next prime is 16538962259. The reversal of 16538962251 is 15226983561.

It is not a de Polignac number, because 16538962251 - 2⁷ = 16538962123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16538962251.

It is not an unprimeable number, because it can be changed into a prime (16538962259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1447390 + ... + 1458771.

It is an arithmetic number, because the mean of its divisors is an integer number (1580952128).

Almost surely, 2^16538962251 is an apocalyptic number.

16538962251 is a deficient number, since it is larger than the sum of its proper divisors (8756271797).

16538962251 is a wasteful number, since it uses less digits than its factorization.

16538962251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906442.

The product of its digits is 777600, while the sum is 48.

The spelling of 16538962251 in words is "sixteen billion, five hundred thirty-eight million, nine hundred sixty-two thousand, two hundred fifty-one".