1611641456 has 20 divisors (see below), whose sum is σ = 3130354704. Its totient is φ = 803808000.

The previous prime is 1611641417. The next prime is 1611641483. The reversal of 1611641456 is 6541461161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119180 + ... + 132011.

Almost surely, 2^1611641456 is an apocalyptic number.

1611641456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1611641456 is a deficient number, since it is larger than the sum of its proper divisors (1518713248).

1611641456 is a wasteful number, since it uses less digits than its factorization.

1611641456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251600 (or 251594 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 1611641456 is about 40145.2544642577. The cubic root of 1611641456 is about 1172.4368952054.

The spelling of 1611641456 in words is "one billion, six hundred eleven million, six hundred forty-one thousand, four hundred fifty-six".