2045665402 has 64 divisors (see below), whose sum is σ = 3603916800. Its totient is φ = 861537600.

The previous prime is 2045665397. The next prime is 2045665409.

2045665402 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (2045665409) 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, 3241627 + ... + 3242257.

It is an arithmetic number, because the mean of its divisors is an integer number (56311200).

Almost surely, 2^2045665402 is an apocalyptic number.

2045665402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2045665402 is a deficient number, since it is larger than the sum of its proper divisors (1558251398).

2045665402 is a wasteful number, since it uses less digits than its factorization.

2045665402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 2045665402 is about 45229.0327334114. The cubic root of 2045665402 is about 1269.4381133977.

It can be divided in two parts, 20456 and 65402, that added together give a palindrome (85858).

The spelling of 2045665402 in words is "two billion, forty-five million, six hundred sixty-five thousand, four hundred two".