1655021402 has 16 divisors (see below), whose sum is σ = 2515536000. Its totient is φ = 816522720.

The previous prime is 1655021393. The next prime is 1655021437. The reversal of 1655021402 is 2041205561.

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 in 7 ways as a sum of consecutive naturals, for example, 424502 + ... + 428382.

It is an arithmetic number, because the mean of its divisors is an integer number (157221000).

Almost surely, 2^1655021402 is an apocalyptic number.

1655021402 is a deficient number, since it is larger than the sum of its proper divisors (860514598).

1655021402 is a wasteful number, since it uses less digits than its factorization.

1655021402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6661.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1655021402 is about 40681.9542549273. The cubic root of 1655021402 is about 1182.8632473786.

Adding to 1655021402 its reverse (2041205561), we get a palindrome (3696226963).

The spelling of 1655021402 in words is "one billion, six hundred fifty-five million, twenty-one thousand, four hundred two".