1945400499 has 36 divisors (see below), whose sum is σ = 3298872720. Its totient is φ = 1101431520.

The previous prime is 1945400473. The next prime is 1945400549. The reversal of 1945400499 is 9940045491.

1945400499 is a `hidden beast` number, since 19 + 4 + 540 + 0 + 4 + 99 = 666.

It is not a de Polignac number, because 1945400499 - 2¹² = 1945396403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1945400419) 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 35 ways as a sum of consecutive naturals, for example, 27834 + ... + 68304.

Almost surely, 2^1945400499 is an apocalyptic number.

1945400499 is a deficient number, since it is larger than the sum of its proper divisors (1353472221).

1945400499 is a wasteful number, since it uses less digits than its factorization.

1945400499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40600 (or 40590 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1945400499 is about 44106.6944918796. The cubic root of 1945400499 is about 1248.3499292249.

The spelling of 1945400499 in words is "one billion, nine hundred forty-five million, four hundred thousand, four hundred ninety-nine".