16251493607 has 4 divisors (see below), whose sum is σ = 16271145576. Its totient is φ = 16231841640.

The previous prime is 16251493597. The next prime is 16251493631. The reversal of 16251493607 is 70639415261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16251493607 - 2⁴ = 16251493591 is a prime.

It is a super-2 number, since 2×16251493607² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16251493007) 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, 9824744 + ... + 9826397.

It is an arithmetic number, because the mean of its divisors is an integer number (4067786394).

Almost surely, 2^16251493607 is an apocalyptic number.

16251493607 is a deficient number, since it is larger than the sum of its proper divisors (19651969).

16251493607 is an equidigital number, since it uses as much as digits as its factorization.

16251493607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19651968.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 16251493607 in words is "sixteen billion, two hundred fifty-one million, four hundred ninety-three thousand, six hundred seven".