1945660450 has 12 divisors (see below), whose sum is σ = 3618928530. Its totient is φ = 778264160.

The previous prime is 1945660441. The next prime is 1945660463. The reversal of 1945660450 is 540665491.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 810711729 + 1134948721 = 28473^2 + 33689^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19456555 + ... + 19456654.

Almost surely, 2^1945660450 is an apocalyptic number.

1945660450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1945660450 is a deficient number, since it is larger than the sum of its proper divisors (1673268080).

1945660450 is a wasteful number, since it uses less digits than its factorization.

1945660450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38913221 (or 38913216 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 1945660450 is about 44109.6412363556. The cubic root of 1945660450 is about 1248.4055296629.

The spelling of 1945660450 in words is "one billion, nine hundred forty-five million, six hundred sixty thousand, four hundred fifty".