1616225646 has 32 divisors (see below), whose sum is σ = 3708972288. Its totient is φ = 459936000.

The previous prime is 1616225609. The next prime is 1616225647. The reversal of 1616225646 is 6465226161.

It is a super-2 number, since 2×1616225646² = 5224370677576234632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616225647) 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, 66115 + ... + 87198.

It is an arithmetic number, because the mean of its divisors is an integer number (115905384).

Almost surely, 2^1616225646 is an apocalyptic number.

1616225646 is an abundant number, since it is smaller than the sum of its proper divisors (2092746642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1616225646 is a wasteful number, since it uses less digits than its factorization.

1616225646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153576.

The product of its digits is 103680, while the sum is 39.

The square root of 1616225646 is about 40202.3089635409. The cubic root of 1616225646 is about 1173.5474783648.

The spelling of 1616225646 in words is "one billion, six hundred sixteen million, two hundred twenty-five thousand, six hundred forty-six".