1649272141 has 4 divisors (see below), whose sum is σ = 1799205984. Its totient is φ = 1499338300.

The previous prime is 1649272129. The next prime is 1649272223. The reversal of 1649272141 is 1412729461.

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 1649272141 - 2⁹ = 1649271629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1649272141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649272111) 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, 74966905 + ... + 74966926.

It is an arithmetic number, because the mean of its divisors is an integer number (449801496).

Almost surely, 2^1649272141 is an apocalyptic number.

1649272141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1649272141 is a deficient number, since it is larger than the sum of its proper divisors (149933843).

1649272141 is a wasteful number, since it uses less digits than its factorization.

1649272141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149933842.

The product of its digits is 24192, while the sum is 37.

The square root of 1649272141 is about 40611.2317099593. The cubic root of 1649272141 is about 1181.4919701541.

The spelling of 1649272141 in words is "one billion, six hundred forty-nine million, two hundred seventy-two thousand, one hundred forty-one".