1641371456 has 14 divisors (see below), whose sum is σ = 3257096610. Its totient is φ = 820685696.

The previous prime is 1641371453. The next prime is 1641371461. The reversal of 1641371456 is 6541731461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 902401600 + 738969856 = 30040^2 + 27184^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641371453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12823151 + ... + 12823278.

Almost surely, 2^1641371456 is an apocalyptic number.

1641371456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1641371456 is a deficient number, since it is larger than the sum of its proper divisors (1615725154).

1641371456 is an equidigital number, since it uses as much as digits as its factorization.

1641371456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25646441 (or 25646431 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 1641371456 is about 40513.8427700953. The cubic root of 1641371456 is about 1179.6023403887.

The spelling of 1641371456 in words is "one billion, six hundred forty-one million, three hundred seventy-one thousand, four hundred fifty-six".