1650405243 has 16 divisors (see below), whose sum is σ = 2236534560. Its totient is φ = 1082352384.

The previous prime is 1650405233. The next prime is 1650405247. The reversal of 1650405243 is 3425040561.

It is not a de Polignac number, because 1650405243 - 2¹⁶ = 1650339707 is a prime.

It is a super-2 number, since 2×1650405243² = 5447674932243778098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1650405243.

It is not an unprimeable number, because it can be changed into a prime (1650405247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75505 + ... + 94877.

It is an arithmetic number, because the mean of its divisors is an integer number (139783410).

Almost surely, 2^1650405243 is an apocalyptic number.

1650405243 is a deficient number, since it is larger than the sum of its proper divisors (586129317).

1650405243 is a wasteful number, since it uses less digits than its factorization.

1650405243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19838.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1650405243 is about 40625.1799134478. The cubic root of 1650405243 is about 1181.7624823010.

The spelling of 1650405243 in words is "one billion, six hundred fifty million, four hundred five thousand, two hundred forty-three".