1645770434473 has 16 divisors (see below), whose sum is σ = 1857933552960. Its totient is φ = 1444067352000.

The previous prime is 1645770434467. The next prime is 1645770434479. The reversal of 1645770434473 is 3744340775461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1645770434467) and next prime (1645770434479).

It is a cyclic number.

It is not a de Polignac number, because 1645770434473 - 2⁹ = 1645770433961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1645770434479) 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, 46198 + ... + 1814848.

It is an arithmetic number, because the mean of its divisors is an integer number (116120847060).

Almost surely, 2^{1645770434473} is an apocalyptic number.

It is an amenable number.

1645770434473 is a deficient number, since it is larger than the sum of its proper divisors (212163118487).

1645770434473 is a wasteful number, since it uses less digits than its factorization.

1645770434473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771608.

The product of its (nonzero) digits is 23708160, while the sum is 55.

The spelling of 1645770434473 in words is "one trillion, six hundred forty-five billion, seven hundred seventy million, four hundred thirty-four thousand, four hundred seventy-three".