1645234036 has 6 divisors (see below), whose sum is σ = 2879159570. Its totient is φ = 822617016.

The previous prime is 1645233991. The next prime is 1645234037. The reversal of 1645234036 is 6304325461.

It can be written as a sum of positive squares in only one way, i.e., 1176078436 + 469155600 = 34294^2 + 21660^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1645233992 and 1645234010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645234037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205654251 + ... + 205654258.

Almost surely, 2^1645234036 is an apocalyptic number.

It is an amenable number.

1645234036 is a deficient number, since it is larger than the sum of its proper divisors (1233925534).

1645234036 is a wasteful number, since it uses less digits than its factorization.

1645234036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411308513 (or 411308511 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 1645234036 is about 40561.4846375228. The cubic root of 1645234036 is about 1180.5269206619.

Adding to 1645234036 its reverse (6304325461), we get a palindrome (7949559497).

The spelling of 1645234036 in words is "one billion, six hundred forty-five million, two hundred thirty-four thousand, thirty-six".