3215623645 has 32 divisors (see below), whose sum is σ = 4394363904. Its totient is φ = 2241907200.

The previous prime is 3215623643. The next prime is 3215623673. The reversal of 3215623645 is 5463265123.

It is not a de Polignac number, because 3215623645 - 2¹ = 3215623643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3215623643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63154 + ... + 102076.

It is an arithmetic number, because the mean of its divisors is an integer number (137323872).

Almost surely, 2^3215623645 is an apocalyptic number.

It is an amenable number.

3215623645 is a deficient number, since it is larger than the sum of its proper divisors (1178740259).

3215623645 is a wasteful number, since it uses less digits than its factorization.

3215623645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39013.

The product of its digits is 129600, while the sum is 37.

The square root of 3215623645 is about 56706.4691635796. The cubic root of 3215623645 is about 1476.0069569581.

Adding to 3215623645 its reverse (5463265123), we get a palindrome (8678888768).

The spelling of 3215623645 in words is "three billion, two hundred fifteen million, six hundred twenty-three thousand, six hundred forty-five".