641605454 has 16 divisors (see below), whose sum is σ = 1137823200. Its totient is φ = 265491744.

The previous prime is 641605453. The next prime is 641605469. The reversal of 641605454 is 454506146.

It is a super-2 number, since 2×641605454² = 823315117205092232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641605453) by changing a digit.

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, 789749 + ... + 790560.

It is an arithmetic number, because the mean of its divisors is an integer number (71113950).

Almost surely, 2^641605454 is an apocalyptic number.

641605454 is a deficient number, since it is larger than the sum of its proper divisors (496217746).

641605454 is a wasteful number, since it uses less digits than its factorization.

641605454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580347.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 641605454 is about 25329.9319778005. The cubic root of 641605454 is about 862.4938671832.

The spelling of 641605454 in words is "six hundred forty-one million, six hundred five thousand, four hundred fifty-four".