16919249901 has 4 divisors (see below), whose sum is σ = 22558999872. Its totient is φ = 11279499932.

The previous prime is 16919249899. The next prime is 16919249951. The reversal of 16919249901 is 10994291961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16919249901 - 2¹ = 16919249899 is a prime.

It is a super-2 number, since 2×16919249901² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16919249951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2819874981 + ... + 2819874986.

It is an arithmetic number, because the mean of its divisors is an integer number (5639749968).

Almost surely, 2^16919249901 is an apocalyptic number.

It is an amenable number.

16919249901 is a deficient number, since it is larger than the sum of its proper divisors (5639749971).

16919249901 is an equidigital number, since it uses as much as digits as its factorization.

16919249901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5639749970.

The product of its (nonzero) digits is 314928, while the sum is 51.

The spelling of 16919249901 in words is "sixteen billion, nine hundred nineteen million, two hundred forty-nine thousand, nine hundred one".