1649015146 has 4 divisors (see below), whose sum is σ = 2473522722. Its totient is φ = 824507572.

The previous prime is 1649015141. The next prime is 1649015167. The reversal of 1649015146 is 6415109461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6415109461 = 223 ⋅28767307.

It can be written as a sum of positive squares in only one way, i.e., 1494982225 + 154032921 = 38665^2 + 12411^2 .

It is not an unprimeable number, because it can be changed into a prime (1649015141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412253785 + ... + 412253788.

Almost surely, 2^1649015146 is an apocalyptic number.

1649015146 is a deficient number, since it is larger than the sum of its proper divisors (824507576).

1649015146 is an equidigital number, since it uses as much as digits as its factorization.

1649015146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824507575.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1649015146 is about 40608.0674989589. The cubic root of 1649015146 is about 1181.4305989803.

The spelling of 1649015146 in words is "one billion, six hundred forty-nine million, fifteen thousand, one hundred forty-six".