1672149645 has 24 divisors (see below), whose sum is σ = 2899353600. Its totient is φ = 891517536.

The previous prime is 1672149601. The next prime is 1672149649. The reversal of 1672149645 is 5469412761.

It is not a de Polignac number, because 1672149645 - 2⁶ = 1672149581 is a prime.

It is a super-3 number, since 3×1672149645³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1672149645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672149649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234036 + ... + 241074.

It is an arithmetic number, because the mean of its divisors is an integer number (120806400).

Almost surely, 2^1672149645 is an apocalyptic number.

1672149645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1672149645 is a deficient number, since it is larger than the sum of its proper divisors (1227203955).

1672149645 is a wasteful number, since it uses less digits than its factorization.

1672149645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12329 (or 12326 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1672149645 is about 40891.9264036313. The cubic root of 1672149645 is about 1186.9298362774.

It can be divided in two parts, 16721 and 49645, that added together give a palindrome (66366).

The spelling of 1672149645 in words is "one billion, six hundred seventy-two million, one hundred forty-nine thousand, six hundred forty-five".