641526434 has 4 divisors (see below), whose sum is σ = 962289654. Its totient is φ = 320763216.

The previous prime is 641526397. The next prime is 641526437. The reversal of 641526434 is 434625146.

641526434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 529230025 + 112296409 = 23005^2 + 10597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 641526394 and 641526403.

It is not an unprimeable number, because it can be changed into a prime (641526437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160381607 + ... + 160381610.

Almost surely, 2^641526434 is an apocalyptic number.

641526434 is a deficient number, since it is larger than the sum of its proper divisors (320763220).

641526434 is a wasteful number, since it uses less digits than its factorization.

641526434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320763219.

The product of its digits is 69120, while the sum is 35.

The square root of 641526434 is about 25328.3721150807. The cubic root of 641526434 is about 862.4584575384.

The spelling of 641526434 in words is "six hundred forty-one million, five hundred twenty-six thousand, four hundred thirty-four".