31641439690 has 16 divisors (see below), whose sum is σ = 65090961792. Its totient is φ = 10848493584.

The previous prime is 31641439663. The next prime is 31641439769. The reversal of 31641439690 is 9693414613.

It is a super-2 number, since 2×31641439690² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31641439690.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226010214 + ... + 226010353.

It is an arithmetic number, because the mean of its divisors is an integer number (4068185112).

Almost surely, 2^31641439690 is an apocalyptic number.

31641439690 is an abundant number, since it is smaller than the sum of its proper divisors (33449522102).

31641439690 is a wasteful number, since it uses less digits than its factorization.

31641439690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452020581.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 31641439690 in words is "thirty-one billion, six hundred forty-one million, four hundred thirty-nine thousand, six hundred ninety".