1491650506 has 8 divisors (see below), whose sum is σ = 2237660100. Its totient is φ = 745763808.

The previous prime is 1491650491. The next prime is 1491650509. The reversal of 1491650506 is 6050561941.

It can be written as a sum of positive squares in 2 ways, for example, as 1489574025 + 2076481 = 38595^2 + 1441^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1491650509) 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, 10900 + ... + 55696.

Almost surely, 2^1491650506 is an apocalyptic number.

1491650506 is a deficient number, since it is larger than the sum of its proper divisors (746009594).

1491650506 is a wasteful number, since it uses less digits than its factorization.

1491650506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61448.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1491650506 is about 38621.8915383491. The cubic root of 1491650506 is about 1142.5863372932.

The spelling of 1491650506 in words is "one billion, four hundred ninety-one million, six hundred fifty thousand, five hundred six".