1641955456 has 32 divisors (see below), whose sum is σ = 3290035500. Its totient is φ = 816221184.

The previous prime is 1641955451. The next prime is 1641955459. The reversal of 1641955456 is 6545591461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1502337600 + 139617856 = 38760^2 + 11816^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (1641955451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14931 + ... + 59218.

Almost surely, 2^1641955456 is an apocalyptic number.

1641955456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1641955456 is an abundant number, since it is smaller than the sum of its proper divisors (1648080044).

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

1641955456 is an equidigital number, since it uses as much as digits as its factorization.

1641955456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74336 (or 74324 counting only the distinct ones).

The product of its digits is 648000, while the sum is 46.

The square root of 1641955456 is about 40521.0495421824. The cubic root of 1641955456 is about 1179.7422246459.

The spelling of 1641955456 in words is "one billion, six hundred forty-one million, nine hundred fifty-five thousand, four hundred fifty-six".