1645214650 has 24 divisors (see below), whose sum is σ = 3061796220. Its totient is φ = 657720960.

The previous prime is 1645214581. The next prime is 1645214653. The reversal of 1645214650 is 564125461.

It can be written as a sum of positive squares in 6 ways, for example, as 1376484201 + 268730449 = 37101^2 + 16393^2 .

It is not an unprimeable number, because it can be changed into a prime (1645214653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93342 + ... + 109558.

Almost surely, 2^1645214650 is an apocalyptic number.

1645214650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1645214650 is a deficient number, since it is larger than the sum of its proper divisors (1416581570).

1645214650 is a wasteful number, since it uses less digits than its factorization.

1645214650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18258 (or 18253 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1645214650 is about 40561.2456662761. The cubic root of 1645214650 is about 1180.5222838779.

The spelling of 1645214650 in words is "one billion, six hundred forty-five million, two hundred fourteen thousand, six hundred fifty".