16345451553 has 8 divisors (see below), whose sum is σ = 21796922400. Its totient is φ = 10895474208.

The previous prime is 16345451543. The next prime is 16345451581. The reversal of 16345451553 is 35515454361.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16345451553 - 2¹⁶ = 16345386017 is a prime.

It is a super-2 number, since 2×16345451553² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16345451543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347583 + ... + 391796.

It is an arithmetic number, because the mean of its divisors is an integer number (2724615300).

Almost surely, 2^16345451553 is an apocalyptic number.

It is an amenable number.

16345451553 is a deficient number, since it is larger than the sum of its proper divisors (5451470847).

16345451553 is an equidigital number, since it uses as much as digits as its factorization.

16345451553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746751.

The product of its digits is 540000, while the sum is 42.

The spelling of 16345451553 in words is "sixteen billion, three hundred forty-five million, four hundred fifty-one thousand, five hundred fifty-three".