641529769390 has 32 divisors (see below), whose sum is σ = 1206365239296. Its totient is φ = 245342117280.

The previous prime is 641529769379. The next prime is 641529769417. The reversal of 641529769390 is 93967925146.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12440842 + ... + 12492301.

It is an arithmetic number, because the mean of its divisors is an integer number (37698913728).

Almost surely, 2^641529769390 is an apocalyptic number.

641529769390 is a deficient number, since it is larger than the sum of its proper divisors (564835469906).

641529769390 is a wasteful number, since it uses less digits than its factorization.

641529769390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24933264.

The product of its (nonzero) digits is 22044960, while the sum is 61.

The spelling of 641529769390 in words is "six hundred forty-one billion, five hundred twenty-nine million, seven hundred sixty-nine thousand, three hundred ninety".