1545805802 has 4 divisors (see below), whose sum is σ = 2318708706. Its totient is φ = 772902900.

The previous prime is 1545805799. The next prime is 1545805813. The reversal of 1545805802 is 2085085451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2085085451 = 31 ⋅67260821.

It can be written as a sum of positive squares in only one way, i.e., 1130909641 + 414896161 = 33629^2 + 20369^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386451449 + ... + 386451452.

Almost surely, 2^1545805802 is an apocalyptic number.

1545805802 is a deficient number, since it is larger than the sum of its proper divisors (772902904).

1545805802 is an equidigital number, since it uses as much as digits as its factorization.

1545805802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772902903.

The product of its (nonzero) digits is 64000, while the sum is 38.

The square root of 1545805802 is about 39316.7369195359. The cubic root of 1545805802 is about 1156.2497300335.

The spelling of 1545805802 in words is "one billion, five hundred forty-five million, eight hundred five thousand, eight hundred two".